If you live in the US, you have a DS and you don't have both Castlevania games, today is the day you will fix that problem. Amazon.com has Portrait of Ruin on sale for $20.99, and its predecessor Dawn of Sorrow for $19.99. Buy them together, and you get free shipping.
That's two of the best games released in the last few years, for less than a copy of Pimp My Ride for the Xbox 360. It's a pretty excellent deal.