Hmmm, yes, 2 quid for a mixed pack of three condoms from a toilets machine and then 39p's worth of parma violets and flying saucers... I am liking this idea very much too, though wondering how it would combine with the sweetcorn.

Second-hand books also good. The tiny branch library up the road from where I used to work when I first moved to Cambridge used to sell books off for 5p and 10p each, so £2.39 would buy, um, [some maths here] quite a few books! Yay maths! Yay books!