Where to buy used phones?

I'm on the lookout for used phones, specifically iPhones (4/4S/5)… Where are the best places to look online?? Thanks in advance

I'm a UK user, by the way!

not sure by what you mean by "best" but think for safety i'd probably buy a used phone from somewhere like amazon :- http://www.amazon.co.uk/Apple-iPhone-4S-16GB-SIM-Free-Black/dp/B005VTIHFA

as you can see just find the phone your looking for and you will usually see links to buy it used at a much cheaper price than new.

may not be the cheapest place to buy a phone but at least you usually have some sort of comeback if there's any problems with it or the seller from amazon itself.

That's a good shout mate, ta. Probably better than this one. http://www.for-sale.co.uk/iphone-4sgood prices etc but its just the after sale that the problems potentially start, apart from ebay perhaps. So many places online these days. Very tiring searching google etc.

I think so you should go with Amazon.co there is alotm of mobiles with many accessories you can find a good option there

Thanks!