EBay users sign up to a standard agreement, which requires them to pay for listing their goods on the site for sale, with payment being deducted automatically from their accounts.
But since the launch of a new billing system on 16th February there has been disquiet about the accuracy of the new system. News reports over the last few months reveal that some sellers have found discrepancies in their accounts, including double-billing and overcharging.
Ebay officially recognised the problem back in April, posting a notice on its Announcements Board to reassure users that the problem would be dealt with, and e-mailing affected users individually.
However, according to the complaint filed in the California Superior Court by Robert Cerreta of Florida and Nancy Spaulding from Ohio, "despite its initial admission that it was double-billing customers as a result of errors in its billing system, eBay began denying that customers were adversely affected at all".
Ebay has made no comment on the lawsuit.