This is $15 at GameStop for their "GameDays" sale
What's important about this is that it comes with like 8 XBLA games
Pac-Man: Championship Edition ($10)
Galaga Legions ($10)
Dig Dug ($5)
Pac-Man ($5)
Ms. Pac-Man ($5)
Galaga ($5)
New Rally-X ($5)
Mr. Driller Online ($10)
Xevious ($5)
Plus a bunch of other arcade games, but they do not come with achievements
Baraduke, Bosconian, Dig Dug II, Dig Dug Arrangement, Dragon Buster, Dragon Spirit, Galaga '88, Galaga Arrangement, Galaxian, Grobda, King and Balloon, Mappy, Metro Cross, Motos, Pac&Pal, Pac-Man Arrangement, Pac-Mania, Pole Position, Pole Position II, Rally-X, Rolling Thunder, Sky Kid, Sky Kid Delux, Tower of Druaga, Super Pac-Man
For $15 you can get over $40 worth of XBLA
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=72549