If you want to wholesale these mines - assuming they are legit (most likely they are not), what you have to do is contact whoever posted these deals and do 2 things:1.

Deal with only established legit firms for such a project.

How wholesaling works in simplest form:1.Wholesaler finds buyers and finds motivated sellers2.Wholesaler contacts seller gets property under contract after negotiating price for property3.Wholesaler flips the contract to his end buyer4.End buyer closes with seller5.Wholesaler gets paid assignment feeIt gets more involved then that but that's what wholesaling is in a nutshell.As far as the situation you described either the wholesaler was trying to assign a property from another wholesaler or he was doing something illegal buy trying to sell you a property he didn't have under contract.Those types make us legit wholesalers look bad and those types should be locked up.

Even if it turns out to be legit, you don't want to deal with a hothead like that.

They're legit, able to put down 30% on a condo, and can provide full documentation. 

Minh's got a strong brick house ;)Not only that, but he loaned me a nice little chunk of change on my word when I needed it, and I got to contribute a little to his daughter's college fund ;)He's legit!

I legit ask him every week "What do I need to pay you for the work you've done?"

If you are just buying a random turnkey property, the seller has probably set the price and you just need to determine if it's a legit price or not.

Before accepting, make sure buyers money is legit.

Our Gurus to Avoid forum is legit and verifiable and fair... unlike what I have read here.