God of War Origins Collection: $20. Totally worth it. Already beat Chains of Olympus (that game goes by QUICK) and I'm in the middle of Ghost of Sparta. Dude, Ghost of Sparta looks INCREDIBLE, better than God of War II in HD, SRSLY.
Also the Ratchet & Clank HD Collection (I have a problem): $30. Also totally worth it. These games look amazing in HD. I can't wait to get to R&C3, because it's one of my absolute favorite PS2 games.