How not to buy motherboards

Hey Greytruck,
Here is about the same story. I set up a booth at a local flea market and advertised that I buy obsolete or non working computer parts. So a guy stops by with a few mother boards and asks if I will weigh it for him. Sure...no problem. It was a little over three pounds. He takes out a pen and paper and multiplies the weight by gold price per ounce and asked me how close I can come to that. I tried to explain to him how it worked, but his eyes just glazed over. Finally I told him EBAY might be a good place to sell those parts.