Yeah that seems pretty reasonable to me (humorous sarcasm). I love how it has one 5 star review, cuz that was from whoever put it on psn lol.
I believe it has more stuff in it which explains the $40 price tag. Should be more like $1-2 but why would someone buy Angry Birds for a console? It's "made" for mobile devices.
I bought all 3 and the almighty eagle on ios, and it was $4 total O.o.
I bought it for a few bucks as a mini but I don't think PSN has anything to do with the pricing. It's probably the same price on xbox live.