Was able to get a used G&W Gallery 4 on ebay for about 15 dollars including shipping a couple of weeks ago.
It's electronic old-school/new-school crack, I tell you. Old and new G&W games are on here, and they're both fun. I think there's decent replay value and challenge, because in order to open new games, you have to earn stars (non-accumulative, btw) by getting high scores above 100 points.
My favorite new school game is Chef; a little bit of Iron Chef and Emeril mixed in with Yoshi ;). The hardest game right now is the old-school Chef; it's Ed Sullivan-plate spinning craziness at its best.
Has anybody had trouble completing the Elimination Chamber challenge? All it says is to win an Elimination Chamber match, which I've done. However, when the match is over, I get nothing and the challenge is still open.