Yes, as stated above....Definately set your account with your Selling Preferences, Blocks and Buyer Requirements..
An ebay automated UPI case can be set so after the 1st 4 days, case is auto opened and if still no payment after the next 4 days (8 in total), case gets auto closed, you get your FVFs refunded, buyer gets a well deserved UPI strike, niether can post feedback and you are free to relist.
By having these set properly, you will not only be helping yourself, you will also be helping your savvy fellow sellers against these non payers.