Simply put: Quick and easy.
I would say that if you have a more expensive phone you would probably do better on e-bay. But if you are not too worried about a few extra £££'s then this is the way to go. Especially if you are clearing our a draw with a few old phones that you would normally throw away... don't. A few clicks is certainly worth the effort for a few quid and you don't even need to pay postage.
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