In for NASCAR 2011 (even with the general bugginess of the game...) I originally paid full price (!) when it came out, but managed to return it for a refund. Eutechnyx says they have fixed many of the bugs...
For whatever reason, I didn't dig SR2 (didn't play the first one), even though everyone else I know seemed to love it. I enjoyed the hell out of GTA IV (even though story-wise my mind began to wander near the end).
Still, at $20 for both this is a great deal if you're inclined towards this type...