i saw a scanner in CT., I live in Cal. I offered them less than what they wanted, they said sure, but they asked if I could pay by cash App or Facebook Pay.They stated that would save them 6 Dollars if they didn't do transaction through cash App. it's only 45 but I don't want to lose that 45 in case they decide not to send item. Which service will back me up if I report them for non shipment of item? Thanks.