I cant answer your question but ....
I've found most of the time the price you'll pay from some of the online shops who do trade-in's is pretty much the same price as a regular sale on ebay
So have a look at for example Music Magpie
https://store.musicmagpie.co.uk/categor ... /iphone-5/There are iphone 5's there for about £60 unlocked - that will come with a warranty and is not that much more than the typical ones that are selling right now on ebay (once you add in postage)