rumplebear wrote   the only thing anyone can do with your bank account details is make a malicious deposit Actually, this isn't right....    If they also get hold of a lot of your details they can get a lot of things at your expense... they can even get credit cards linked to your account, change your address and take a lot of money off you.   You should never give out your details.   Do you not read the news rumplebear

Yes I do read the news...but as the OP has not been back to clarify exactly what they mean by "personal details" I think it is drawing a pretty long bow to assume the seller wants them to "clean out their bank account".