Wholesaling-how exactly does it work?

[Meryl McElwain]

I recently heard a remarkable story of a wholesaler claiming they picked up a house for 32,000 and then turned around and flipped it to a contractor for 54,000 within a span of 10 days. The story is true; which leads me to my question-how exactly do you get someone to sell you their house for half of what its apparently worth? I've heard all the marketing strategies. I'm not looking for marketing advice. I want to know who the audience is. What type of person agrees to a deal like this? And why?!