Outpost.com is offering the Nintendo DS and Super Mario 64 DS for $164.99. If you have yet to find it locally or just want to save a few bucks, this is a good deal as you save $15 by purchasing these items together and is tax free for most states (sales tax is only charged in AZ, CA, CT, IL, OH, NV, TX and WA). Free standard shipping is also included.

Nintendo DS & Mario DS - $164.99 with free shipping

Thanks for the tip, Privale!