Gold Sellers in party finder solution

So as you maybe already noticed, there are gold sellers in party finder.

And i have an idea for quick solution of that problem, the game is f2p so banning them is not a solution cuz they have bots for that, the bots create massive amount of accounts just to post that spam in the finder so you will never end banning them, what you can do is make party finder a level requirement, like 40 or 50+ cuz let’s be honest, did anyone of you use party finder before reaching endgame? I mean everything there is locked before 50lvl, only 2 things are working, Platinum Field (I don’t even know what is it) and Other, for both categories I can’t find a single normal player group that wanna do something so it’s useless and even more useless before reaching 50.