To play devil's advocate, a XBone with 2 digital games is $349 right now. Trade the Wii U and games/accessories to GameStop and you will get a quick $100-$150 for the system, and about $10-$20 a game/extra controller.
ps4 instaed. I have had the thoughts, Last time i checked, i have Wii u games worth around 167$ if i trade them in at Coolshop.com
Gamestop dont pay mutch, and they are expensive as hell