Please, please have it ‘checked out’ with a mechanic you Trust! I have been stung several times with second hand cars - including ones from dealers! No one takes responsibilty & it is a pain in the xxxx to try and make a complaint. The best I got was a through inspection from my mechanic and a 6 month warantee where the vendors insurance paid out (only up to Eu500 however) if anything major went wrong (which it did!).
Good luck 😉
(sorry to say I have lost faith in people. Knowingly selling on a car that has problems! I know it is a difficult time economically at present, but no reason to be downright dishonest).
Perhaps there is an equivilent of AA/RAC who can do an official pre-purchase inspection? (Well worth the money if it saves you buying a dud car!).