Where is the best place to buy a cheap iphone 4?

I currently have an Evo 3d and HATE it. I got it for an upgrade back in march. I have been searching on eBay for a lower priced iPhone 4 but not all the prices are cutting it for me… All i wanna know is. Is there a website where they sell iPhone 4's for a lower price off contract and with a clean ESN?

Actually, The online shop like e-bay, godaddy, amazon etc is the best place to buy a cheap iphone 4.It also, you can search the online shop where they offer discount price to buy electronics. If you wish to sell your iphone then, i like to recommend you to sell it some smart on-line recycle retailers like Craigslist, Cellitused etc. I actually have sold-out my iphone at cellitused with a decent worth.
http://www.cellitused.com/

Used iphone 4 amazon is $297.48
$291.99 + $5.49shipping