For those that may have missed out on this price point in the past, Amazon has Valkyria Chronicles (PS3) for $19.99.
http://www.amazon.com/Valkyria-Chronicles-Playstation-3/dp/B0016C3260/ref=sr_1_1?ie=UTF8&s=videogames&qid=1269484760&sr=8-1
This is also the price at Gamestop, but this may be...