PSP discs vary in value depending on which game it is. Games that are popular and resold less often will be worth more money then games that are considered bad and resold very often.
The value the game will based on demand for it. You can look online and see what other people are selling them for. You can also call local pawn shops and video game store and see how much they are worth.
It depends on the game sport game like madden are not worth much. Is your game a classic is it a new release it all depends on this. Go to amazon and see if how much each game may cost by comparing.
