Actually most of the great third party Wii games are dirt cheap these days..
Mad World (7 bucks on amazon, a complete steal at that price)
Little King's Story
Monster Hunter Tri
Rayman Origins
RE: 4
Red Steel 2
Zelda Twilight Princess (Nintendo selects)
Dawn of Discovery
Muramasa
House of the Dead: Overkill
Boom Blox
De Blob
Sonic Colors
Mario Strikers Charged (surprisingly great online system)
Super Monkey Ball: Banana Blitz
Super Mario Galaxy (Nintendo select)
Wii Play
Traumua Center: Second Opinion
Trauma Team
Ivy the Kiwi
Punchout (Nintendo selects)
Sin and Punishment
That should keep ya busy ;). ..and that's just from what I've played..
you also might want to try out Fragile Dreams if you like RPGs. Haven't played it but I've heard good things. The whole use of the flashlight with the wiimote definitly intrigues me, and I hear the story is great.
The sweetest thing is that all those games are under the $20 mark, via amazon. And all are AAA or close to it when considering their price. Wii's library definitly shines with quality budget games, mostly because of overlooked third party games that no one bought, forcing the companies to drop the prices.
