Hmmm...I've had great luck at FutureMark's & [H] buy/trade if you're looking to move it in a hurry and you're good at spotting fakes. I've also gotten great deals at Rage3D, nVnews, and just lately over at Elite Bastards. (I just picked up an 80Gb WD special edition for $50 shipped and the guy only lives a couple of hundred miles away so it gets here QUICK! Also, he's leaving it loaded up with his Enterprise & CSI collection....add to that I can pay cash and keep it under the wife's radar and it kind of explains why I buy sooo much hardware thru the forums.)
I've had really good experiences buying thru forums, I've been very lucky. I like shopping there, people actually price things well and you can really get great deals and know what you're getting.