Create a system in the game that will control at what price certain things are sold using the bazaar.
Some players sell items on the bazaar, setting a value for them to then buy them on another account to forward golds.
Which among other things, the rmt community apparently does, and there have been several posts here on the forum with screenshots of in-game characters spamming the golds-for-money price into chat.
Each item according to the affixes and stats tier would have some recommended price / it could definitely be automated with some function ( I’m not a programmer ) for example similar to a loot filter that if the item has …
And given exceptions in price ranges with a big difference could be reviewed.