Do you use videogame online trading sites? (GamesTZ, Goozex, etc.)? Gaming Q of the Day 10-15-10

I used Goozex once, to get the one free game for signing up. Never used it since.

I've used Goozex a few times (to get some old Gamecube games I wanted to play again and use the free points/trade they give you on sign up to get Blinx for the Xbox).
 
I'd mostly judge it in a case-by-case basis since the games all come from the users, but from my experience, it's a neat service. A few times, the case was covered in stickers or a little dented, but the discs have been relatively clean. And the cash-to-point conversion rate made them cheaper than just going down to Gamestop and digging through the used games rack. 

Say wha?
I used some of the auction sites from Holland to get some classics, but ever since the gamestore opened up in my town with their used section I got everything I need.

I got a Darksiders game for the PS3 for free from a friend of mine using that stuff. 
 
To this day I am so fucking bummed I didn't ask for Dead Space.

Trading games? God no, I buy 'em fresh at the store. 

Nope, never quite understood how it worked and never took the time to find out.

I chose wha?!?!?! because of these questions

I have used Goozex a couple times when my game ( Blood on the Sand) was "selling high" and some games I wanted were "selling low."