Because it isn't ANY pre-owned game. The coupon online clearly states any game under $20. The YMMV is irrelevant. As someone else also pointed out it isn't your YMMV anyway, more like try to find a manager dumb or lenient enough to attempt an over ride.
so I just had an unbelieveable thing happen. I go to get the coupon to override the crappy 70% play and charge deal and I wound up saving even more money cause the manager stacked the 70% price and 30% off coupon.
http://imgur.com/cbtgfF6
http://imgur.com/sMtlT4j
so it wound up costing like...
Push them hard, ask to speak to their manager. They had no problem matching their online store and stacking with the coupons. How could they charge considerably less for everything online in store?
They had no more of the controller/play and charge kits for XB1 so they sold me a controller with 70% off a play and charge kit.
I wound up purchasing a Mario Wii U Controller, 3DSXL Mario Retro Case, XB1 Controller and a play and charge kit. It is annoying though that all of their B&M prices...