I know of a guy in PA that needs to be in jail but that's another story.
My wife and I sold a pop up camper for $500 back in 2002 I think. Made a deal, then we received a bank check in the mail for $4200. I emailed the person back, they said yes, please cash check, send me back 2500, keep your 500, and then pay my "hauler" the rest as "I own a wholesale company and they will pick it up for me". Being suspicious, I took check to bank and had then run it and check it out. Teller asked where I got it as he said it was a fake check, told him story of the sale. He said this was like 3rd one this week in out area, they get you to cash the check, send them the money, then you are out ALL the money once the truth comes out and you have to pay it all back. I went to police with all info, the said they would investigate. Meanwhile, I told person I had cashed the check, but if they wanted their money, they would have to pick it up in person. This went on for about a week and half, they were getting furious with me over email. I finally revealed to them we knew this was scam, police had all info and their IP address, etc. Nothing ever came about it though.
I did a search then for the name they used. This lady's name popped up on a camper forum, seems they did exact same scam to her buying a camper, although she fell for it, sent them the money. She had to sell both her old camper and the new one she had bought to cover the money from the bank. Then they turned around and was using her name to scam others.
A lot of scum out there these days.