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Home / Water Heating & Filtration / System boiler refurbished & used for sale | For Sale UK
Ideal 173554 evo istor - 173554,

Ideal 173554 evo istor - 173554,

£104.70
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Baxi system boiler 15kw - ng,

Baxi system boiler 15kw - ng,

£394.30
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System boiler valliant ecofit - boiler,

System boiler valliant ecofit - boiler,

£249.00
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Ideal heating logic max s15 - ideal,

Ideal heating logic max s15 - ideal,

£1050.00
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Heating inhibitor boiler - inhibitor, 1l

Heating inhibitor boiler - inhibitor, 1l

£8.95
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Viessmann vitodens 100 - viessmann, 11kw

Viessmann vitodens 100 - viessmann, 11kw

£759.00
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Ideal heating gas - gas, system

Ideal heating gas - gas, system

£1335.99
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Ehs 14kw electric - 14kw,

Ehs 14kw electric - 14kw,

£312.70
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Concentrated inhibitor central - concentrated,

Concentrated inhibitor central - concentrated,

£7.29
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Heating inhibitor 500ml - heating,

Heating inhibitor 500ml - heating,

£7.99
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Ideal vogue max - max, gas

Ideal vogue max - max, gas

£312.70
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Concentrated inhibitor a100 - concentrated, 1l

Concentrated inhibitor a100 - concentrated, 1l

£8.79
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Vaillant ecotec plus gb - vaillant,

Vaillant ecotec plus gb - vaillant,

£1200.36
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Ideal 175160 main - ideal, heat

Ideal 175160 main - ideal, heat

£299.99
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Vaillant ecotec main - main, heat

Vaillant ecotec main - main, heat

£61.94
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Worcester greenstar junior - greenstar,

Worcester greenstar junior - greenstar,

£74.36
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Vaillant ecofit sustain 418 - ecofit, vu

Vaillant ecofit sustain 418 - ecofit, vu

£373.90
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Potterton performa promax - potterton, 28

Potterton performa promax - potterton, 28

£48.99
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Main eco compact 25 - compact, &

Main eco compact 25 - compact, &

£54.39
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Main eco compact system 18 - main,

Main eco compact system 18 - main,

£78.70
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Vaillant ecofit sustain 618 - vaillant,

Vaillant ecofit sustain 618 - vaillant,

£394.30
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Main eco compact - compact, 18

Main eco compact - compact, 18

£66.00
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Adey mc1 central heating - mc1+,

Adey mc1 central heating - mc1+,

£6.52
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Ideal 182443 pump head kit - pump,

Ideal 182443 pump head kit - pump,

£229.50
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Main combi 24he - 24he, system

Main combi 24he - 24he, system

£41.04
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Boiler 12v 24v hot - hot, water

Boiler 12v 24v hot - hot, water

£319.00
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Worcester greenstar junior 24i - worcester,

Worcester greenstar junior 24i - worcester,

£93.99
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Main combi 30he system 18he - 30he,

Main combi 30he system 18he - 30he,

£30.00
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Ideal 175615 main - 175615, heat

Ideal 175615 main - 175615, heat

£149.99
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Heatrae sadia megaflo - sadia,

Heatrae sadia megaflo - sadia,

£84.94
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Baxi 7808435 pump - pump, for

Baxi 7808435 pump - pump, for

£156.70
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Baxi 830 system - 830, gas

Baxi 830 system - 830, gas

£1128.70
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Fernox tf1 omega - omega, 2

Fernox tf1 omega - omega, 2

£57.90
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Baxi white wall mounted - white, boiler

Baxi white wall mounted - white, boiler

£237.82
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Concentrated inhibitor central - inhibitor,

Concentrated inhibitor central - inhibitor,

£32.49
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Boiler filter replacement

Boiler filter replacement

£23.00
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Ideal i24 mini - c30,, logic

Ideal i24 mini - c30,, logic

£59.99
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Baxi main potterton combi - main,

Baxi main potterton combi - main,

£129.99
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Worcester bosch control - control, box

Worcester bosch control - control, box

£260.70
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Annual gas boiler - gas,

Annual gas boiler - gas,

£103.66
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Worcester greenstar 4000 12kw - worcester,

Worcester greenstar 4000 12kw - worcester,

£899.99
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Vaillant expansion vessel fits - expansion,

Vaillant expansion vessel fits - expansion,

£29.99
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Worcester greenstar cdi - worcester, 30

Worcester greenstar cdi - worcester, 30

£49.99
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Ideal vogue s15 - s15, ie

Ideal vogue s15 - s15, ie

£13.95
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Vaillant eco tec plus system - tec,

Vaillant eco tec plus system - tec,

£414.70
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Ideal system filter 22mm - system,

Ideal system filter 22mm - system,

£89.09
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Concentrated inhibitor boiler - inhibitor,

Concentrated inhibitor boiler - inhibitor,

£7.65
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Ravenheat csi 85t system - ravenheat,

Ravenheat csi 85t system - ravenheat,

£4.47
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Baxi 818 824 - baxi,

Baxi 818 824 - baxi,

£8.65
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Worcester greenstar 30i 30ri - worcester,

Worcester greenstar 30i 30ri - worcester,

£46.50
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Worcester greenstar 30i - worcester,

Worcester greenstar 30i - worcester,

£75.66
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Worcester greenstar cdi system - worcester,

Worcester greenstar cdi system - worcester,

£20.39
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Keston system s30 boiler - keston,

Keston system s30 boiler - keston,

£89.99
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Worcester greenstar r28 - worcester, 28

Worcester greenstar r28 - worcester, 28

£55.29
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Vaillant ecotec plus - plus, vu

Vaillant ecotec plus - plus, vu

£312.70
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Worcester greenstar cdi - greenstar, 30

Worcester greenstar cdi - greenstar, 30

£14.25
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Qettle boiling tap system 2l - system,

Qettle boiling tap system 2l - system,

£99.49
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Main combi 24he system - 24he,

Main combi 24he system - 24he,

£41.04
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Uponor smatrix pulse whole - uponor,

Uponor smatrix pulse whole - uponor,

£817.60
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Hts central heating magnetic - hts,

Hts central heating magnetic - hts,

£47.49
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Worcester greenstar cdi system - greenstar,

Worcester greenstar cdi system - greenstar,

£20.95
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Main eco compact - main, 15

Main eco compact - main, 15

£99.99
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Concentrated leak sealer - leak,

Concentrated leak sealer - leak,

£7.29
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Worcester bosch greenstar - worcester,

Worcester bosch greenstar - worcester,

£660.00
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Ideal system 24 - system, &

Ideal system 24 - system, &

£109.25
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7688421 kit pcb for - for, baxi

7688421 kit pcb for - for, baxi

£73.50
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Gas meter adapter tool system - gas, -system

Gas meter adapter tool system - gas, -system

£74.00
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Concentrated sludge remover - sludge,

Concentrated sludge remover - sludge,

£6.79
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Main combi 24he system - main,

Main combi 24he system - main,

£28.20
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Ideal logic system - ideal,

Ideal logic system - ideal,

£49.50
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Main combi 30he - combi, system

Main combi 30he - combi, system

£34.80
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Grant vortex eco system - grant,

Grant vortex eco system - grant,

£1500.00
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Worcester greenstar system - greenstar,

Worcester greenstar system - greenstar,

£37.20
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Gas meter adapter - gas, -system

Gas meter adapter - gas, -system

£74.00
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Vaillant ecofit sustain 618 - vaillant, vu

Vaillant ecofit sustain 618 - vaillant, vu

£312.70
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Viessmann 100 wb1hc - viessmann, 19kw

Viessmann 100 wb1hc - viessmann, 19kw

£71.05
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Main combi eco 30 - main,

Main combi eco 30 - main,

£33.70
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Ideal logic combi 35 - 30, &

Ideal logic combi 35 - 30, &

£8.95
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Central heating magnetic - heating,

Central heating magnetic - heating,

£45.99
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New intergas xtreme 24kw combi - xtreme,

New intergas xtreme 24kw combi - xtreme,

£1399.00
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Worcester greenstar r28 - 28,

Worcester greenstar r28 - 28,

£31.02
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Fernox central heating - fernox, f1

Fernox central heating - fernox, f1

£13.59
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Worcester pump 8716117400 - pump,

Worcester pump 8716117400 - pump,

£109.99
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Boiler 12v litre - 5,

Boiler 12v litre - 5,

£189.00
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Worcester greenstar cdi system - cdi,

Worcester greenstar cdi system - cdi,

£19.36
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Fernox tf1 omega - tf1, 2

Fernox tf1 omega - tf1, 2

£55.00
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Baxi 100he system - 100he,

Baxi 100he system - 100he,

£29.30
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Baxi system 24 - baxi,

Baxi system 24 - baxi,

£8.95
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Baxi 818 824 system 825 - 818, &

Baxi 818 824 system 825 - 818, &

£134.99
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Worcester greenstar junior - worcester,

Worcester greenstar junior - worcester,

£38.85
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Main eco compact - main, 18

Main eco compact - main, 18

£59.00
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Sime format system 24 - sime, 30

Sime format system 24 - sime, 30

£69.99
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Baxi main potterton 248042 now - baxi,

Baxi main potterton 248042 now - baxi,

£43.99
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Main combi 30he system 18he - main, &

Main combi 30he system 18he - main, &

£33.00
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Worcester white wall mounted - worcester,

Worcester white wall mounted - worcester,

£233.94
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Worcester greenstar - greenstar, 29

Worcester greenstar - greenstar, 29

£156.56
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📊96 listings · from £4.47 · avg £201.69
⚠️ These listings were last updated more than 13 days ago. Search for fresh listings

Browse 96 system boiler listings currently in our index. Prices range from £4.47 to £1500, with an average of £201.69. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about system boiler →

Try this: under sink unvented water heater | vaillant ecotec combi boiler | vaillant ecotec fan | vaillant ecotec plus 831 | vaillant ecotec pro 28 | vaillant vcw 242 | vokera compact pcb | vokera heat exchanger | water cylinder | worcester 24i fan

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Everything you need to know about system boiler

Whether you are looking for a brand-new or second-hand system boiler, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £4.47, while premium listings can reach £1500 — giving you a wide budget spread to work with. The average price of £201.69 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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