itrecovery, there are buyers like that. Lucky you that you had 2800 sales before you met the first one. I was unprepared and my first scammer for $3.75 item got me off my cool. eBay did not help in extortion case so I filed a $1,500 small claim for slander damages under Ontario regulations. Buyer laughed first, then he requested unexplained $3,000 damages to himself. Judge fined him for not attending the settlement and wasting everybody's time. Then he hired local lawyer (he is off province) and they asked me to drop the charges. Apparently he does not want his $3,000 damages now. His total is -$100 fine minus lawyer's fee (say $300-$500).
$3.75 item and offensive communication is all it takes ...
Costed me $75 for filing plus $19 for Xpresspost, both of which I practically got back from $100 fine judge awarded me for him not attending.
If you are p***ed, there is things you can do. However, if your time is precious, don't do it. I would not do this again.