Took forever because the systems kept crashing for trade ins. Either way, I got NSMBU and Sonic All Stars for 82$ at Best Buy. Only had to pay 2$ out of pocket after trading Halo 4 and Assassins Creed 3, I'll likely rebuy them later after the price drops
Probably YMMV because of Black Friday coming and them cancelling most of their own matching policies. Though the guy just took 20% of each title for me.