A small shop in a rural town that sells collections of clothes made from extinct and straight up mythical creatures. Depending on the material, the clothes could be for plain fashion, or further functions. For example, a purse made from T-Rex skin, a Thylacine fur shirt, or Woolly Mammoth Coat.
On the mythical side, there could be items like a dragon scale jacket that's impenetrable or fire resistant, Werewolf fur hat that heightens senses, mermaid tail pants that enhance swimming speed, and so on.
Everything would have a tag describing materials used and possibly a vague description of effects (depending on material). I'm thinking the store would be unattended and "on your honor" to leave money in a box on the counter. Stealing would result in the disappearance of the culprit and the item would be back in the store the following day. Maybe a product made from some part of the thief would appear in the store too (this may be a bit much, let me know). Finally, the shop would be updated with new items on a bi-weekly basis.
Thanks for reading, please give me suggestions!