If you list as buy now or buy now with best offer for the 30 days in your store the cost will be only 20c or 50c per listing depending on the store you have.

Then you can have immediate payment required and till they pay the item is still an active listing for others to buy and once they pay then the listing ends as sold.

If they were sold at auction and there was more than 1 bidder then do 2nd chance offers once the non payer disputes are closed then you only pay the final value fee and no relisting fee.

The listing fees are a lot more for auction listings.