Jonathan Holmes quite liked Paper Mario: Sticker Star and Chris Carter tells me it got a bad rap. I'm a huge fan of the original game on N64 and The Thousand-Year Door, but the differences found in this 3DS installment put me off. At $7.99, however, all bets are off. That's how much Sticker Star is right now during Best Buy's two-day sale.
There's also Mario & Luigi: Dream Team for $24.99, another one that I'm sadly missing from my 3DS library. To that end, if you're looking to get into the system -- it's a fantastic time to do so, I might add -- the retailer has 3DS XLs for $169.99 and regular 3DS units for $139.99.
Holiday Kickoff 2-Day Sale [Best Buy]