Yeah, definitely have to agree with this. I sold something on ebay to someone. He payed through paypal, and I didn't realize it was an instant transfer, not an echeck. I sent him a email saying I received payment, and would be holding it for 4 days AS STATED IN THE AUCTION. He complained about that rather quickly, and I corrected my error and apologized. It was too late to send it out by then, but I got it out the next day. He left negative feedback still, stating that I unfairly held his payment for an extended period.
