www.glyde.com is a site that sells new and used dvds, games, etc.
Use code 'SUMMER5' to get a $5 credit that is good on shipping as well (shipping runs $3.27 for me)
It doesn't easily sort price low to high, but there are dvds that are running $1.50-$2 netting free or very cheap movies. I didn't look around the other portion of the site so am not sure what the price of games or other items are.
Their site has timed out a couple times on me, so I think that code must have just been released, or just now everyone is finding out about it haha