All you can do is place them on your blocked bidders list, so they cannot do it to you again.
http://offer.ebay.com.au/ws/eBayISAPI.dll?bidderblocklogin&hc=1&hm=uk%601d72f%2Bj2b2vi%3C265Open unpaid item disputes, so the non-payers get the strikes, which enable other sellers to auto-block them, if they choose to.
http://pages.ebay.com.au/help/sell/unpaid-items.html
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Buttercup: You mock my pain! Man in Black: Life is pain, Highness. Anyone who says differently is selling something.
