Cashiers will sometimes give a 10% “shopworn discount” for gutted games if you complain about it. Also, unopened gutted games can be returned just as new games.
Used games you don’t like can be exchanged for others within seven days (just don’t abuse the policy or it’ll be taken away)
Pre-orders are fully refundable at any time (don’t let a fearful employee tell you otherwise)
First-party accessories have more resale value (and are much more reliable than off-brand)
To get a Wii, ask when a store gets weekday shipments, call daily around that time, then hightail it over there before they’re sold out again.