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Casio 991ex classwiz - fx-991ex,
£13.49
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Pro 991ex classwiz advanced - fx-991ex,
£10.73
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Vintage ncr field - ncr,
£9.99
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991ex classwiz advanced - fx-991ex,
£10.99
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Casio 991ex classwiz - fx-991ex,
£12.29
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Casio 991ex classwiz - casio,
£11.99
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Casio 991ex classwiz - fx-991ex,
£13.99
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Casio 991ex classwiz - fx-991ex,
£13.79
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Casio 991ex classwiz - fx-991ex,
£12.99
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Pro 991ex classwiz advanced - classwiz,
£11.99
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Lightweight multi function - lightweight, multi-function
£8.95
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Newyes engineering scientific - engineering,
£17.05
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Casio 991ex classwiz - casio,
£25.00
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Casio calculator fx 991ex - casio,
£12.99
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Casio 991ex classwiz - casio, fx-991ex
£14.21
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552 function scientific - 552,
£17.09
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Helect line engineering - 2-line,
£12.93
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Line engineering scientific - 2-line,
£7.49
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Casio 991ex classwiz - casio, fx-991ex
£12.40
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Casio 991ex classwiz - casio, fx-991ex
£14.79
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Casio 991ex classwiz - casio,
£14.49
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Renus line engineering - renus,
£7.90
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Casio 991ex classwiz - fx-991ex,
£13.99
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991es classwiz advanced - fx-991es,
£11.99
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Vintage 1950s fearns - vintage,
£21.50
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Casio 991ex classwiz - casio,
£6.78
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Casio 991ex classwiz - casio,
£17.49
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Line engineering scientific - 2-line,
£9.79
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Casio 991ex classwiz - fx-991ex,
£13.29
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Casio 991ex classwiz - casio,
£12.92
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Casio 991ex classwiz - fx-991ex,
£14.40
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Construction calculator with - construction,
£32.34
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Classwiz advanced engineering - classwiz,
£8.99
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Casio 991ex classwiz - casio,
£12.49
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Calculator with writing tablet - with,
£9.99
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Casio 991ex classwiz - casio, fx-991ex
£13.99
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Casio 991ex classwiz - fx-991ex,
£12.99
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Helect line engineering - helect,
£11.86
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Helect line engineering - helect,
£7.99
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Engineers scientific - engineers,
£35.84
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991ex classwiz advanced - fx-991ex,
£12.53
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Casio 991ex classwiz - casio,
£14.95
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Casio 991ex classwiz - casio,
£13.49
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Casio 991ex classwiz - fx-991ex,
£13.79
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Rugged line engineering - rugged, 2-line
£11.54
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991ex classwiz advanced - fx-991ex,
£12.95
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Student scientific advanced - student,
£9.99
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Scientific calculator maths - scientific,
£5.56
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Pro 991ex classwiz advanced - pro, fx-991ex
£13.99
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991ex classwiz advanced - fx-991ex,
£15.59
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Scientific calculator writing - scientific,
£17.99
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991es classwiz advanced - classwiz,
£10.89
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Sigmund heating engineers - heating,
£4.99
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Renus line engineering - 2-line,
£11.31
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Engineering student calculator - student,
£9.99
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Casio 991ex classwiz - casio, fx-991ex
£11.99
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Pro 991ex classwiz advanced - pro,
£13.45
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Genuine casio 991ex - genuine, fx-991ex
£89.99
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Casio 991ex classwiz - casio, fx-991ex
£10.99
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Casio 991ex classwiz - fx-991ex,
£16.50
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991ex classwiz advanced - classwiz,
£15.54
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Casio 991ex classwiz - casio, fx-991ex
£15.29
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Casio 991ex classwiz - casio, fx-991ex
£13.49
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Casio 991ex classwiz - casio, fx-991ex
£15.08
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Casio fx991ex classwiz - casio,
£15.82
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Casio 991ex classwiz - casio, fx-991ex
£13.99
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991ex classwiz advanced - fx-991ex,
£13.99
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Perkins engines motolusa - engines,
£1.28
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Lcd 991ex classwiz - fx-991ex, advanced
£13.98
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Casio 991ex classwiz - fx-991ex,
£12.99
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Renus line engineering - 2-line,
£9.80
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991ms scientific calculator - 991ms-ii,
£19.99
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991ex classwiz advanced - fx-991ex,
£16.99
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Scientific calculator with - scientific,
£17.99
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New 991ex advanced - fx-991ex,
£20.01
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Pro 991ex classwiz advanced - pro,
£13.99
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Construction calculator - construction,
£51.47
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Scientific calculator 991ex - scientific,
£15.59
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991es plus classwiz - plus,
£11.99
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991ex classwiz advanced - fx-991ex,
£16.99
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Tradesman math and - math,
£46.20
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Renus line engineering - renus, 2-line
£3.30
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991ex classwiz advanced - fx-991ex,
£12.99
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Line digit engineering - 12-digit,
£62.99
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Renus line engineering - renus,
£9.72
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991ex advanced scientific - fx-991ex,
£18.59
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Foldable advanced - 2-in-1,
£14.99
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Scientific calculator 991ex - scientific,
£12.99
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Professional line - professional, 2-line
£11.95
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Helect 1002 scientific - helect, h-1002
£10.96
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Pro 991ex classwiz advanced - pro,
£14.99
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Casio 991ex classwiz - casio,
£14.49
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Line engineering scientific - 2-line,
£10.93
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Casio 991ex classwiz - casio, fx-991ex
£15.99
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Casio 991ex classwiz - casio,
£14.00
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Engineers scientific
£58.43
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Looking for more engineers calculator?
Search eBay live — fresh results filtered for the best value, updated every hour.
Browse 96 engineers calculator listings currently in our index. Prices range from £1.28 to £89.99, with an average of £16.03. 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 engineers calculator →
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Whether you are looking for a brand-new or second-hand engineers calculator, 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 £1.28, while premium listings can reach £89.99 — giving you a wide budget spread to work with. The average price of £16.03 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.