The importance of shopping around
Bloody hell. Let's hope the prices they offer are better than the estimate. I just got £186 for my 4S from one of the recyclers. I could perhaps have got more by eBaying it, but that would have taken time and effort.
And yes, I did get a 5S. The best feature for me is the newly larger screen size. Larger, that is, than a 4S, given that I didn't have a 5. As for the fingerprint thing, not fussed at all.