All games have free shipping. Gamefly games comes with original cases, manuals, and other inserts (such as Online Passes). Usually the games are in pretty good shape, but they are used games.
Unsure if these are part of a one-day sale or just price drops.
Paper Mario: Sticker Star - $17.99
Donkey Kong Country Returnds 3D - $17.99
Luigi's Mansion: Dark Moon - $19.99
Mario & Luigi: Dream Team - $24.99
If a game is only letting you rent it and not buy it, it means it is out of stock.