We hear from another reader who has been left out of pocket because of eBay's money back guarantee scheme Is online marketplace eBay really protecting the interests of its users? It claims to take action in 30,000 cases each month when something goes wrong and users are out of pocket. Yet after Telegraph Money reported on a case where the online giant’s user protection systems failed to help one reader, others were quick to comment and email about similar poor – and sometimes costly – experiences. Ebay’s main protection for buyers is its Money Back Guarantee service. This was launched...