Or they could just make a NFT trade thread.
People would post what they have and what they want. Once they traded they delete.
You’d check the thread from the beginning, only current offers and recently deleted offering will be visible
If the layout is standardized enough, if everybody use the same design and avoids mentioning the backstory for the trade, it should be easy on the eye
No need to have mods handle the market
Example:
NFT: Ambrosia
Small picture of the NFT maybe
Interested in:
Negotiable: yes/no
(If yes, PM)
PS: Anyone can set it up, next person who reads this and wants to trade, create the thread, then post the first offering