He was the one who later accepted the amount and regretted it, but I admit I made a mistake first i apologize, but I have also ask the buyer if he could accept $275, then actually he did accepted this amount and asked me the delivery time. Unfortunately, he said the transaction was invalid. Actually there is nothing wrong with me, but he insulted me, blamed me, and called me an unethical trader, but you don't have to worry, as long as you don't insult me. I will not do anything to anyone else!