My parents were huge dealers most of my life so I grew up in hundreds of auctions, auctions houses, flea markets, car auctions. This was before the Internet killed everything like that. They also owned different businesses. From carpet cleaning to flipping cars, they did it. So I saw a few common traits in people when you're dealing with the public. There's a mind game to buying or selling. Some people call it art.

Rule number one, never haggle on price until you arrive in person face to face. Dont even mention it because it kills the sellers energy dealing with you and they will gladly let someone else see it before you do.

#2 If you want the item, you better drop everything and run to get it because most people ain't gonna hold it until you're actually driving to meet them. Even then, don't be surprised if it's gone. That's why it's imperative that you don't piss the seller off with haggling over the phone.

#3 When selling something, never leave your house because when you do, the buyer knows they have you over the barrel at that point.

Just say, can I come look at it right now, or whenever you're ready to show it. That usually puts you ahead of the others.
And always have cash and a gun hidden. And let someone know where your going and send the profile to them if it's thousands of dollars.

People are printing fake car titles these days so you have to be careful.