Actually you can ask for payment in 5 days, 3 days, or 24 hours but....Figure it this way...you can't even file an Unpaid Item Dispute with Ebay until a FULL 7 days have passed. Give 7 days, and if you haven't heard from the buyer by then you can file a dispute on the 8th day. (or a full 7 days and 1 second)