If any messages from them clearly state they are trying feedback extortion with you, call eBay, ask to speak to a supervisor, tell them exactly what the buyer's history is and send them copies of your emails/messages with them.
(copy of my post on your other thread)
It is a lot easier to get your message across to eBay, by calling them.
good luck
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Buttercup: You mock my pain! Man in Black: Life is pain, Highness. Anyone who says differently is selling something.
