For Pokemon whose gender can be either male or female, there is a value known as the gender breakpoint which is the borderline between the determination of. Well I am on this reliable website where you trade and buy games, and someone just offered me $35 for Pokemon Crystal, which seems like a. Game Boy games lists, cartridges price guides, Game Boy rarity Pokemon 3 Games Lot Red, Blue, Yellow Nintendo Game Boy NEW BA. October 3, at 1: November 20, at Values listed are for NTSC versions where applicable unless otherwise stated. The best I can think of is gamestop, as they often miss out on price trends. The power of nostalgia might prevent me from doing that, but hey, everyone's got a price.