I offer these (amongst other things) on my ebay listings. Brand new, cheaper than the RRP and free postage to UK people (I maybe able to offer a service to buyers outside of this area). If you would prefer to pay through my ebay listings (100% feedback) please message me and I'll send you the details.
Details/prices below:
Casio fx-991EX Scientific Calculator. 552 Functions.
Price: £17.99
Casio fx-83GTX Scientific Calculator. 276 Functions
Price: £8.79
Casio fx-85GTX Scientific Calculator. 276 Functions
Price: £9.99
Casio fx-83GTX Pink Scientific Calculator. 276 Functions.
Price: £10.99
I also offer many other items. Most of my stock is brand new and I post promptly (normally within 24 working hours). As mentioned, I have 100% feedback on ebay also.