That's a pretty standard scam, unfortunately. I was selling a washer and dryer (moving), I don't remember the price but it was fair. Guy shows up, my husband helps him load the pair on his truck, he then offers us half the price we had agreed on, says that's the best he can do. We were so mad about him trying this that we got them off the truck and refused the sale even when he suddenly discovered he had the full price after all. He left empty handed and we sold them to someone else.