Listia is a marketplace for Free Stuff where you can give away stuff you don't need anymore and get stuff you want in return for free. It's fun, free and very easy to use.
Visit listia.comWide Skyscraper
160x600
Multiple
$7.50 CPM
Medium Rectangle
300x250
Multiple
$7.00 CPM
Leaderboard
728x90
Multiple
$8.00 CPM