Earlier quoted context omitted.
I'm genuinely curious. Do you need to go to a physical bank location to do this? How do you buy a car in the evening or a Saturday afternoon, when a bank is closed?
Direct account-to-account transfer is supported between all major EU banks. It takes a couple of seconds at most, and it's free.
I've always bought and sold vehicles (or anything private sale) in cash in Canada because I am extremely leery of reversible payment methods where the payment account owner can claim 'fraud' and I'm out the item and the money.
Craigslist and Kijiji (the most popular online classifieds platforms) explicitly warn people to deal only in cash because of this problem.