Just a little anecdote from my own personal life... Yesterday I was looking for a cove base gouge. I always check amazon because I have prime, so I checked. There was one that fit my needs listed for $100. It was shipped through a third party, so I did a little (and I mean minimal) digging and found out who the actual supplier was.
The supplier sells direct for $17.95.
Now, I could go on every seller/product page, seeking out sellers just to go off on a rant about how terrible amazon sellers are, how they are scammers advertising products they don't actually own for exorbitant prices, then once they get an order, buying direct and shipping themselves keeping $80 or whatever as profit. I could say amazon sellers are the worst and have no place in online commerce.
OR...
I could say "Wow I'm glad I have the common sense to do my own due diligence and check numbers before I waste money."
Just saying. Not making excuses for "wholesalers" that don't know what they're doing or are deliberately misrepresenting themselves/their deals. But it's a fact of life that there are "bad" people. As an investor you should have the wherewithal to check your numbers and do your own due diligence before throwing away tens or hundreds of thousands of dollars... Whether you're buying from a wholesaler or an agent. It's a lazy mindset to expect the world to spoon feed you.
Of course wholesalers should only market good deals and should be knowledgeable and transparent. However, a fool and his money are easily parted.