Hi.. @ 6 days and no communication its time to file an unpaid dispute to recover your final value fee.....
http://pages.ebay.ca/help/sell/unpaid-items.html
Buyer has 4 days to pay or you can then close.
Add the buyer to your blocked bidder list..
Do you have requirements set to block members with 2+ unpaid strikes...
http://pages.ebay.ca/help/sell/manage_bidders_ov.html