Selling Electronic Stuff on Gazelle.com

[TBS]

I can get a 16GB iPhone 4S for either $50 (for a refurbished phone, 90 day warranty) or $100 (for a new device, one yr warranty).

And then Gazelle.com claims they will buy my existing iPhone 4 for $147 (good not excellent condition). So, I can theoretically make $50-100 by upgrading and continuing my contract with ATT for two more years (which is not a problem to me)

Anybody had experience with Gazelle.com? General web search is 50% rants, 50% raves, no middle ground.

And what's the experience here on refurbished iPhones? Mine have been pretty bulletproof over long lives, but maybe I'm just lucky that way.

Thanks

[RedWolf]

I sold them my iPhone 4 when the 5 came out. Easy peasy, no issues whatsoever and they paid me quickly. I would definitely use them again.