I think the convenience of marketplace being on everyone's phone (but not my flip phone... LOL) makes it easy for people to quickly send a message. I think most know 10 seconds after they respond that they are not serious. I had a guy get rude because I wouldn't hold the Harley for a week off his word that "he'd buy it". LOL. I told him I get those commitments non-stop. It's sold when somebody puts cash in my hand. I'll hold it if you get a hold of me and say you are leaving and will arrive at XX:XX time. It's not on hold till the day you leave and message me you are leaving. Don't want anyone to waste 2 hrs on the road and have it be sold when they get here.