When it comes to selling/buying vehicles, you could attract scammers from your posts. Online car selling/buying is being searched daily by persons who want the money only. This isn't a figment of my imagination. It's fact!
IMO, the best thing is to send a message a few days before any planned meetings.
Include an exact ref to moneys involved. For a sale, "I expect you will have the exact amount (list amount) in cash, with you. (cashier checks aren't really safe unless you do the following) We will meet only at my Bank to exchange money/paperwork and have the title notarized for a proper sign off of the vehicle. Being at your Bank will allow you to accept a cashiers check, as your Bank can freeze the funds, to ensure payment to your account. For a buy, or sale, being in your bank gives you safety to accept/give any money. You have to look at what you buy before making the deal, write down the serial number of a buy, and never offer cash to buy. You don't want to leave the Bank with any form of funds on your person.
A buyer can leave with your car and his money, if you meet just anyplace.
So, here's why I posted this. I have a Chevy HHR SS for sale, an interested buyer (?) emailed me, and gave an offer of $6,200 for my asking price of $7000. I declined. We had a few emails back and forth, and he came back at $6,800. Close enough, but his new offer came a little too quick. Being cautious I sent an acceptance email, exact cash only, at the bank only, and why at the Bank was safer for both of us. Never heard from him again, not even a simple no. Hmmmm. I know what I think. Be concerned for yourself and your money, and not have to worry about being followed to your home to be robbed.