The recourse is to stop doing fixed price auctions where your starting price is what you think the item is worth. That is not a real auction, and the person who you think is a recurring low balling bidder just might be someone who knows more about what items are worth than you think.
There is no such thing as a "fixed price auction". I use the auction format almost exclusively more for time management than anything else but I set my starting bid price at what my minimum acceptable ROI is and let it go from there. If I cannot be competitive then I will not list the item on eBay but utilize other platforms and venues.
You should consider doing what ebooksdiva said. Or if you really like auctions, maybe try running a true auction with a low starting price or at least a reasonable starting price where someone might actually get the bidding rolling. As someone who has mostly sold stuff through auctions (true auctions) on eBay for decades, I just don't understand why fixed price auctions are even called auctions to begin with. Best of luck, though, with whatever you decide to do!
They are not called fixed price auctions there is not such thing it is either an auction or a BIN listing. What I never understood was why sellers use best offer on auctions. Simply set the starting price at your lowest acceptable price and ditch the best offer. Personally I don't have the time to deal with best offers.
