I had a local CL seller tell me that although a buyer was en route to buy a machine they were selling, they'd not answer the door, or tell the person it was already sold once they got there, if I were to offer them more money for it...
Crazy! And so if I were to stoop to their level and do that, who's to say I wouldn't show up and be in the same situation as the first guy? Rude and unscrupulous people are everywhere.