Wal-Mart tried a video games trade-in strategy in 2009. It didn't work. With CExchange, will it work now?

[youtube http://www.youtube.com/watch?v=KxD5EAG-rWk&w=600&h=315]

This seems like an interesting plan: Wal-Mart is now going to accept video game trade-ins in 3,100 or so of their 4,835 U.S. stores. It's interesting because normally when you trade-in a video game -- say, at GameStop -- you use the money to probably buy another video game. But at Wal-Mart,…