Sinclair calculator
Sinclair calculator for sale on Ireland's largest auction and classifieds sites
Vintage sinclair zx80 - vintage, - £104.70
Its untested have • Way test - Free postage - New and Used
Its untested have • Way test - Free postage - New and Used
Sinclair scientific - sinclair, - £40.00
Sinclair scientific programmable • Calculator vintage led • From 1970s made - Free postage - New and Used
Sinclair scientific programmable • Calculator vintage led • From 1970s made - Free postage - New and Used
Sinclair cambridge calculator - cambridge, - £14.01
Sinclair cambridge calculator • From renowned brand • This retro device - Free postage - New and Used
Sinclair cambridge calculator • From renowned brand • This retro device - Free postage - New and Used
Sinclair wrist calculator - sinclair, - £511.60
Extremely rare sinclair • Wrist calculator superb • Condition cardboard sleeve - Free postage - New and Used
Extremely rare sinclair • Wrist calculator superb • Condition cardboard sleeve - Free postage - New and Used
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Sinclair cambridge - sinclair, - £70.00
Hand made 1977 • Part sinclair computing • Kit family relative - Free postage - New and Used
Hand made 1977 • Part sinclair computing • Kit family relative - Free postage - New and Used
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48 listings · from £5.99 · avg £118.81
⚠️ These listings were last updated more than 92 days ago.
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Browse 48 sinclair calculator listings currently in our index. Prices range from £5.99 to £1050, with an average of £118.81. 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 sinclair calculator →
Vintage sinclair oxford - sinclair, - £40.21
This rare 1974 • Sinclair oxford 100 • Won wait under - Free postage - New and Used
This rare 1974 • Sinclair oxford 100 • Won wait under - Free postage - New and Used
Rare sinclair cambridge - rare, - £68.30
Sinclair cambridge programmable • Calculator battery not • Used test picture - Free postage - New and Used
Sinclair cambridge programmable • Calculator battery not • Used test picture - Free postage - New and Used
Sinclair zx80 replica kit - sinclair, - £103.66
Zx80 replica kit • Computer nostalgic exciting • Allows users build - Free postage - New and Used
Zx80 replica kit • Computer nostalgic exciting • Allows users build - Free postage - New and Used
Sinclair computer working - ql, - £208.70
- Free postage - New and Used
- Free postage - New and Used
Sinclair calculator kit sold - sinclair, - £286.70
Radionic pocket calculator • Kit made sinclair • Amazing condition have - Free postage - New and Used
Radionic pocket calculator • Kit made sinclair • Amazing condition have - Free postage - New and Used
Sinclair science calculator - science, - £29.99
- Free postage - New and Used
- Free postage - New and Used
Sinclair cambridge calculator - cambridge, - £68.30
Boxed sinclair cambridge • Calculator box case • Some corrosion battery - Free postage - New and Used
Boxed sinclair cambridge • Calculator box case • Some corrosion battery - Free postage - New and Used
Sinclair oxford 150 - 150, calculator - £20.00
Sinclair oxford 150 • Calculator vintage retro • That operates battery - Free postage - New and Used
Sinclair oxford 150 • Calculator vintage retro • That operates battery - Free postage - New and Used
Sinclair scientific calculator - sinclair, - £229.49
Sinclair mains adaptor • Scientific programmable calculator • Sets are already - Free postage - New and Used
Sinclair mains adaptor • Scientific programmable calculator • Sets are already - Free postage - New and Used
Sinclair cambridge calculator - cambridge, - £52.70
First very sinclair • Cambridge series introduced • Summer 1973 vintage - Free postage - New and Used
First very sinclair • Cambridge series introduced • Summer 1973 vintage - Free postage - New and Used
Vintage sinclair scientific - vintage, - £99.50
Calculator case are • Very good condition • There have been - Free postage - New and Used
Calculator case are • Very good condition • There have been - Free postage - New and Used
Rare sinclair calculator kit - rare, - £203.50
Very rare sinclair • Cambridge calculator kit • Believed complete but - Free postage - New and Used
Very rare sinclair • Cambridge calculator kit • Believed complete but - Free postage - New and Used
Sinclair printer - sinclair, - £5.99
- Free postage - New and Used
- Free postage - New and Used
Vintage 1970s sinclair - vintage, - £29.99
See pics working • But stiff press - Free postage - New and Used
See pics working • But stiff press - Free postage - New and Used
Vintage sinclair zx81 computer - vintage, - £57.89
Zx81 software catalogue • Programming guide cassette • Tape programs sinclair - Free postage - New and Used
Zx81 software catalogue • Programming guide cassette • Tape programs sinclair - Free postage - New and Used
Vtg sinclair zx8i - vtg, home - £47.50
This product vintage • Sinclair zx81 home • Computer 16k ram - Free postage - New and Used
This product vintage • Sinclair zx81 home • Computer 16k ram - Free postage - New and Used
Sinclair sovereign stainless - sinclair, - £151.50
Sinclair sovereign calculator • Box instructions carry • Pouch excellent condition - Free postage - New and Used
Sinclair sovereign calculator • Box instructions carry • Pouch excellent condition - Free postage - New and Used
Spectrum pico red 128k 48k - red, - £38.14
Great little machine • Which emulates spectrum • Computer mancave children - Free postage - New and Used
Great little machine • Which emulates spectrum • Computer mancave children - Free postage - New and Used
Vintage sinclair cambridge - sinclair, - £47.50
Currently not firing • Batteries personally make • Sure your item - Free postage - New and Used
Currently not firing • Batteries personally make • Sure your item - Free postage - New and Used
Sinclair calculator watch kit - calculator, - £1050.00
Outer case clean • Wonderful almost years • Cardboard slip - Free postage - New and Used
Outer case clean • Wonderful almost years • Cardboard slip - Free postage - New and Used
Sinclair spectrum plus - zx, - £190.00
- Free postage - New and Used
- Free postage - New and Used
Sinclair cambridge calculator - sinclair, - £82.86
Fully working batteries • Included - Free postage - New and Used
Fully working batteries • Included - Free postage - New and Used
Mk14e enhanced sinclair - mk14e, - £32.09
This set four • Pcbs build enhanced • Mk14e computer also - Free postage - New and Used
This set four • Pcbs build enhanced • Mk14e computer also - Free postage - New and Used
Sinclair cambridge calculator - sinclair, - £59.99
Calculator case instructions • Great condition - Free postage - New and Used
Calculator case instructions • Great condition - Free postage - New and Used
Vintage sinclair cambridge - vintage, - £59.95
This has been • Tested full working • Order - Free postage - New and Used
This has been • Tested full working • Order - Free postage - New and Used
Sinclair wilco zx80 zx81 - sinclair, - £465.69
Zx80 zx81 clone • Ready run sinclair • 16k dual mode - Free postage - New and Used
Zx80 zx81 clone • Ready run sinclair • 16k dual mode - Free postage - New and Used
Sinclair oxford 200 - sinclair, - £60.00
Display eight digits • Model oxford 200 • Type basic calculator - Free postage - New and Used
Display eight digits • Model oxford 200 • Type basic calculator - Free postage - New and Used
Sinclair cambridge - sinclair, - £68.30
This vintage sinclair • Cambridge programmable calculator • From 1977 red - Free postage - New and Used
This vintage sinclair • Cambridge programmable calculator • From 1977 red - Free postage - New and Used
Little computer people - computer, - £24.99
Sinclair spectrum 128k • Only little computer • People discovery kit - Free postage - New and Used
Sinclair spectrum 128k • Only little computer • People discovery kit - Free postage - New and Used
Empty box including internal - empty, - £45.00
Box internal polystyrene • Foam trays famous • Sinclair zx80 personal - Free postage - New and Used
Box internal polystyrene • Foam trays famous • Sinclair zx80 personal - Free postage - New and Used
Sinclair cambridge computer - sinclair, - £89.99
Has relatively low • Serial number - Free postage - New and Used
Has relatively low • Serial number - Free postage - New and Used
Sinclair spectrum 48k - sinclair, - £94.29
Sinclair spectrum great • Condition box really • Nice poly inserts - Free postage - New and Used
Sinclair spectrum great • Condition box really • Nice poly inserts - Free postage - New and Used
Sinclair spectrum 48k - sinclair, zx - £73.45
Cassette recorder fully • Working when tested • Music tape fast - Free postage - New and Used
Cassette recorder fully • Working when tested • Music tape fast - Free postage - New and Used
Spectrum 2 128k - +2, - £250.29
Everything has been • Professionally serviced ready • Play right out - Free postage - New and Used
Everything has been • Professionally serviced ready • Play right out - Free postage - New and Used
Sinclair zx81 computer the - &, - £39.99
Untested power supply • Including parts only • Returns please - Free postage - New and Used
Untested power supply • Including parts only • Returns please - Free postage - New and Used
Spectrum 48k plus - spectrum, - £29.99
Good condition legs • Spectrum 48k upgraded • This case very - Free postage - New and Used
Good condition legs • Spectrum 48k upgraded • This case very - Free postage - New and Used
Sinclair zx81 computer unit - zx81, - £28.97
Sinclair zx81 computer • Unit vintage mainframe • United kingdom this - Free postage - New and Used
Sinclair zx81 computer • Unit vintage mainframe • United kingdom this - Free postage - New and Used
Sinclair spectrum 48k - sinclair, - £89.95
This original spectrum • Shown pictures works • Great tried show - Free postage - New and Used
This original spectrum • Shown pictures works • Great tried show - Free postage - New and Used
Sinclair spectrum 48k - spectrum, - £98.46
Also all keys • Seem function can • Seen from pictures - Free postage - New and Used
Also all keys • Seem function can • Seen from pictures - Free postage - New and Used
The spectrum retro games - the, - £79.74
Get this time • Christmas brand new • Spectrum retro games - Free postage - New and Used
Get this time • Christmas brand new • Spectrum retro games - Free postage - New and Used
Sinclair spectrum mug - spectrum, - £6.95
Gift boxed high • Quality ceramic mug • Dishwasher microwave proof - Free postage - New and Used
Gift boxed high • Quality ceramic mug • Dishwasher microwave proof - Free postage - New and Used
Sinclair spectrum personal - zx, spectrum+ - £85.00
Model spectrum ideal • Restoration repair projects • Donor parts display - Free postage - New and Used
Model spectrum ideal • Restoration repair projects • Donor parts display - Free postage - New and Used
Sinclair cambridge memory - sinclair, - £67.27
Sinclair cambridge memory • Calculator vintage unit • From mid manufactured - Free postage - New and Used
Sinclair cambridge memory • Calculator vintage unit • From mid manufactured - Free postage - New and Used
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Everything you need to know about sinclair calculator
Whether you are looking for a brand-new or second-hand sinclair calculator, eBay offers one of the largest selections available online. With 48 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 £5.99, while premium listings can reach £1050 — giving you a wide budget spread to work with. The average price of £118.81 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.