There’s good money to be made in buying and selling used video games. With big players such as Amazon getting in on the action, competition is sure to heat up quickly. The latest retailer that’s trying to get a piece of the pie is Wal-Mart. The retailer recently leased space to automated kiosk manufacturer e-Play.   As a result of the agreement between e-Play and Wal-Mart, 77 Wal-Mart stores will have e-Play kiosks that will let you sell used video games and rent movies or games for $1 per day. According