I'm gonna say yes, you probably should.
Bioshock 1 is worth it for the story and atmosphere alone, and Bioshock 2 improves a lot of the gameplay elements, and is a good game in its own right. The games are only somewhat related (as in, they both take place in Rapture), but they're both worth playing. Plus, they're both super cheap now, no reason not to, in my opinion.
Personally, Twilight Princess is my least favourite Zelda game, so I don't really think it's worth playing. Prime 2 is a pretty good game, though not as good as Prime 1. Also, it does that cheap thing where it tries to make the game feel twice as big using light/dark mechanics. It's still decent though. Prime 3 is an okay game, but not a particularly good Metroid game, in my opinion.
Ultimately, it's up to you how you spend your money, but that's my two cents.