It's not strictly a fighter, but it's a 3rd-person arcade action game. The Gundam Vs. series goes back about ten years now- Federation Vs. Zeon and Gundam Vs. Zeta Gundam came out in the US for PS2. Capcom started the Vs. series based on an engine they created for their Spawn arcade game.
It's...
It has a tremendous learning curve and it's an OCD collect-fest, but it's a game where you can see your progress very clearly. When a monster that wiped you out earlier in the game goes down in a couple of minutes, it's tremendously satisfying.
Poker Smash is similar to Tetris Attack/Puzzle League/Panel de Pon, which is my favorite puzzle series ever. I paid full price and still don't regret it.
I've been putting off Dynasty Warriors Gundam 2 for a while- now that the price has dropped this would be a great time to go ahead and do it! If I had $100 to throw around, I'd probably throw in Batman: Arkham Asylum while I was at it...