Make wierd stuff. Someone will probably buy it.
There’s an item that allegedly came out of a trade with Ephesus that is “the brains of a Salt Lord” - its a fist sized bottle with cotton wool.and blue food coloring. It’s made its way to my auction three times.
Other wierds that have made it include the Queen of Pet Rocks (googly eyes, wool hair, ISTR foil crown); poppets of all the then-current Archmages (Archmagi?); a set of cloth samples; and a cheesecake-y portrait of a character
Other folks have written things like hand drawn maps of the Empire; herbals; and illustrations of the upgrades you could have to your ships (all fluff, but several people were discussing the merits of deeper draft or smoother line).
There’s a fair few folk making jewelry, but also costumes, and amulets (there is a clay frog on my desk as I type this)
There is a market out there for almost anything. A few pointers:
Made is almost always preferable to bought
Try to have a few things instead of too much variety
Use decent materials, as best you can - bone can masquerade as ivory, polished wood, polished stone,- you won’t get much for cardboard and glitter -. But dont use real gold.
Keep it simple. Simple done well is infinitely more saleable than complex done badly.
Give each piece a story. It aint just the orcs who value something based on its tale.