PSP (1G $?)

Actually I can't really guess the real prise but I will try my best :

Example :

Three Kingdom Musou 2 $300 - $400
Reason : ( Famous in PS2 game before )

Keroro $ 400 - $500
Reason : ( Famous in tv )

roibhnro ( Any not famous game ) $ 100 - 200
Reason : ( Not famous )

Every game have different price , it just depends on which do you like .