It seems "Best Buy Math" works best in our favor when you combine any "sale item" game with a GCU coupon. Right now, Pikmin 3 for Wii U is on sale for $54.99 (normally $59.99). So with the GCU discount, the $20 OFF coupon, and Best Buy Math, it comes out to $26.99.
Is it a good time to bite? Or...