[pdurrant]

I don't have a set price, in that I've never consciously decided "this much and no higher", but looking at the price I've paid for books I've read since the start of 2010, it seems I have a 'de facto' set price, in that of the 283 books in that list, I've only paid more than $8 for five of them (<2%), more than $7 for nine of them (~3%), and more than $6 for 22 of them (<8%).

I think I must have an upper limit of $8/£5. Any more than that and I won't buy, except in exceptional circumstances.