HOW MUCH WOULD IT COST TO BUY AN IPHONE OFF EBAY?

Wanting to know how much the average price is - 10points to a link to one 'unlocked'.

Thank you ^.^

Which iPhone? 3, 4, 4S, 5, 5C, 5S? Also where are you? UK, US, somewhere else? The price will be different depending on which one you want and where you are. If you add this information to the question you will get some answers.