Get the buyer to purchase the draft at a local branch of his Bank and go with them to get it, do not accept bank drafts from strangers, alternatively have the funds wired to your bank getting a fair deposit say €300 for the car in advance of providing your details., I have done both previously and will again in the future, a genuine buyer has no problems with either practice.
Beware and don't get carried away with a quick sale to repent later, keep the goods until you are paid in full.