From Beyond the Grave (1974)

From Beyond the Grave is a 1974 Amicus Productions founded, horror compedium movie, starring Peter Cushing as a shop owner, and various people go into his shop, to get antiques. Meanwhile, a man hangs around outside, waiting to do something. Should the customers cheat him, they will meet a nasty fate. There are four stories, involving a mirror, a snuff box, a war medal, and a big door, the latter of which leads to a strange room.