This is one of the weirdest eBay hustles I've ever heard about.
A few years back a real scum bag purchased a guitar off me then stole the real floyd rose off it and returned under the item not as described. I Got cops in on it and PayPal actually paid me the entire value of the guitar so I got my guitar and the money for it. other news the scum bag was caught doing this similar thing to a local store in his area and ended up with a Felony larceny over it. The fuckin floyd rose showed up in the mail returned to me by the police department. who knew that things actually work out.
Hope you get things resolved in your situation.
Had a similar situation where I bought something that was, ehmmmm, misrepresented, and paid for it. After a couple days, to a couple weeks, contact had stopped. I left a message with the Police in his town, and was surprised a detective got back to me. They actually went to the guy's house (that I was able to track down using some detective work of my own) and got the guy to send me the guitar. I ended up parting in and getting most of my money back, but it could have been worse and left stuck with nothing. Always thankful to that Police department for stepping up and helping out.