In the absence of specific time guidelines, a seller can file a complaint if payment has not been received within ten days of auction close. The bidder must, however, comply with any additional or more stringent terms set forth in the auction listing.
Note that a bidder can be considered non-paying if he or she fails to complete the auction for any reason, including the inability to pay using the method required in the auction.
Multiple non-paying offenses by a bidder may lead to disciplinary action from eBay. Sellers are also known to leave rather scathing negative feedback for non-paying bidders.