I’m skeptical. Why would you want someone ELSE to sell your MOC’s? That just makes them even MORE expensive.
It is EXTREMELY time consuming to acquire the parts (unless you work at a LEGO store with a PaB wall) and to assemble MOC’s … at almost no return for your effort. Parts are so expensive that unless you have a niche creation for which people are willing to spend a lot of money (ex. wedding topper) the buyers are few and far between. Some builders use a bunch of stickers to successfully sell MOC’s. Many builders seem to have resorted to selling instructions for their MOC’s.