The only reasonable response I could think of is "your son with the truck can give me the cash when he comes to pick it up. This is cash-and-carry only, as I posted on my ad." But then - I would always say "cash and carry only" on ads. There's a risk that I might lose out on a buyer. But if I was going to do sales on facebook regularly I'd have a bill-checker, and there'd be a near-zero risk of ever being scammed by only taking cash.
|