Saw on slickdeals front page that Gamedealdaily is currently selling:
Mario Kart 7 digital download for $17.49
http://gamedealdaily.com/3ds/mario-kart-7-full-game-download/
Yoshi's New Island digital download for $19.49
http://gamedealdaily.com/3ds/yoshis-new-island-full-game-download/