You are attractive to scammers because you are new to selling (at least recently) on ebay and selling expensive items.
How sad that there are people like this.
To add insult to injury, the scammer called you a scammer, if that's the item. These types of people are "bottom feeders".
Watch out for spoofed paypal emails too, claiming the buyer paid, so always log into your own account to verify.
Just an opinion... I generally will not list anything over $100 here on ebay on my selling account; if an auction goes beyond that, fine. That's just my risk tolerance level, because of your experience and other scams, I sell expensive items locally, face to face. That's just me though. Many are fine with selling items that list for thousand$ on ebay, and maybe never have problems.
With ebay, they generally favor the buyer, no matter the truth or lie, but maybe an appeal will work, especially that ebay has proclaimed or pretend to proclaim better seller protection.
Some people here who have been in the same or similar situations, say they file a police report (which you did), and/or notify the scammers local police of their experience just to let them know. Some here also have reported filing a case of mail fraud with the USPS. I hope others offer better advice.
good luck
