Collector interest
A minimalist Yanoman puzzler that stayed Japan-only, Keeper is a late-catalogue Super Famicom curiosity whose low profile paradoxically feeds its scarcity: lightly pressed, never reissued or exported, it rarely turns up complete with spine card. The bare cartridge trades cheaply, but the pristine Japanese complete becomes the real quarry. Territory for fans of obscure puzzlers and sharp SFC collectors, far from any mainstream cult.