We were selling a piece of furniture on Facebook marketplace and someone messaged right after listing it saying they wanted it but needed us to hold it for a few days until she got paid.  So we turned a couple others away saying it was sold.  Not only did she flake on coming to pay/pick up for about a week, but started yard sale-haggling on the price trying to get us to lower it AFTER she already said she wanted it knowing the price we were asking.  We were getting ready to move so just took it to DI rather than reward her trying to take advantage of us.