Sites that i currently list on and use...

Amazon Store:
http://www.amazon.com/shops/SDC702

Craigslist:
East Bay Listings

I get free stuff from:
Swagbucks.com
E-rewards.com
SurveySavvy
Mom Saves Big

I Trade on:
Goozex
GameTZ
Amazon
Gazelle
TA Trading Thread

My Gamer Sites:
My Xbox 360 Profile
Achieve360points.com
My Xbox 360's Blog
My Gamer Card
Wiiso.com
PSPMafia.com
DS Scene.net
Trueachievements.com