So I've had a car of mine (a '98 BMW) for sale for a while, and I had some people text me last night to arrange to look at it. I met with them in person today, and they made an offer. I told them I needed to sit on it, and I made them a counter-offer a few hours later and they agreed on it. They asked if they could pay with a certified check as they bank online and do not have a physical bank branch anywhere close (I verified this), and they would either have to get the money from ATM withdrawals which are limited to $500 a day (would take over a week), or drive a few hundred miles to the closest bank. I agreed to accept a certified check. I am planning on calling the bank and verifying the account and funds before I go through with the title transfer. Everything seems legit, but Is this a scam?