Bad, or unethical Wholesalers?

[Bienes Raices]

I was considering buying from a wholesaler as one avenue in buying a property.

I've seen some posts on here to avoid the ones are that bad, that some "sell junk". My question is, how do they manage to do this in a relatively small local community of investors, since their bad reputation would get around? Don't they need a stable list of buyers for their deals? Or do they only sell to newbies?