I have sold him 3 items, and each time he said they weren't what I advertised them as. He asked for a heavy discount, and I agreed.
I thought I was wrong. This time I had a nice piece of jewelry that was marked 18K on the back. I tested it first. It tested 18K. He bought it, and immediately said it was 14K and he would keep it if I knocked 90.00 off. I said no, and he returned it. I took it to 2 very reputable jewelers for testing, and they both said it's 18K. Now he has a claim against me. I won't let him buy from me again. There are too many honest dealers out there.