Hi ..Listing ended last evening. Its nice when buyers pay immediately but not all do and hopefully you will receive within 48 hours. Send a reminder on day 3 , if necessary.
Ebay allows unpaid item disputes to be opened after 4 days as process detailed here..
http://pages.ebay.ca/help/sell/unpaid-items.html
Buyer has 4 days to pay otherwise you can close and request credit for final value fee and buyer receives a strike against there account. Relist at that point.
Additional..do you have buyer requirements set to block bidders with 2+ strikes among others..
http://pages.ebay.ca/help/sell/manage_bidders_ov.html
Non payers should be added to your blocked bidder list..
http://pages.ebay.ca/help/sell/manage_bidders_ov.html#block
Hopefully none of these actions will be necessary.