Game prices always depend on the game, but the PlayStation Store prices are not often below retail.
Chat with our AI personalities
It is $15 from the Playstation Store
It depends on which PlayStation it is (1, 2, 3 or the portable one) plus the cost of each game.
Now you can pick them up for like $20
If you mean "PlayStation plus" it costs $59.99
playstation on-line doesn't cost anything. You would need wifi though