After opening door 52, you see three creatures. one of them is in a dark room. so dark, all you see is two glowing eyes and 2 tentacles. you can't see its mouth, but it moves its eyes like it's happy. It uses one of its tentacles to point at a sign on top of it that says: "Jeff's shop" You then see multiple items like lockipicks and crucifixes on the table. Looks like you found a place to spend all those coins!