Collector interest
A beach volleyball outing from I'Max, badged 1991 GB Cup, this Japanese release stays obscure outside its home market. A minor sport on Game Boy plus a low-profile publisher keep surviving copies thin, and its Japanese value rises mainly because complete examples rarely resurface. The appeal rests on genuine scarcity of the Japanese pressing, not on a cult reputation, which limits it to completists chasing the I'Max sports catalogue.