It would be interesting if the Mysthaven dealer, given his adjacent position to an illicit den, offered some unique merchandise to characters who visit that place, rather than just typical fence stuff.
(https://media.tenor.com/VBeQwrReyQIAAAAM/do-you-spice-the-legend-of-vox-machina.gif)
That is a player-owned business; therefore, those items had to be approved to go into the store. I haven't seen the player around. I play one of the silent partners.