Paypal has a protection policy. You may qualify buyer protection

As far as the dude who jacked you, you would want to give a police report. Sometimes the cops won't take one. In which case, you would want to contact SD county District Attorney's office.
SD DA . They will unilaterally determine whether you case has merit and proceed from there.

Since the alleged crime occurred via the internet, you should also contact the FCC


Also try consumer affairs

When this guy realizes you are serious, he'll probably weigh the consequences between giving you your money back pr possibly facing criminal charges.

Good Luck Bro. Hope you get this guy.

Peace

RIL

P.S. BTW, save all your info..the DA will want to look at it. If you have a log of events, that would be best.