This is the calculator used by most secondary school students during GCSE and A level. Sainsburys usually sell this @ £7.99 and I have seen this as low as £3.99.
I found this in the Rice Lane store this morning and bought all 6 that were left. Before anyone gets upset I am not going to sell them on, I am a teacher and will distribute these in my classes to help kids with the rock solid calculations I set them :o
Hope this helps some people out there.