first-party nintendo titles (especially mario ones) are notoriously hard to find deals on because they never have price drops or get clearanced out. mario kart ds is still $35, mario party 4, 5, 6, 7 on gamecube were $50 for ever and ever etc etc. the secondary market (ebay, etc) is probably the most promising place to look for a deal lower than retail. that or wait for TRU's B2G1F deal in october.