Do I have to take back auctioned car ???

Hello about 2 weeks ago a VW bus auctioned (Ebay) about 1 week later the car was picked up the good man still printed a little bit on the price because the radio was not built in. Then he was paid with cash and gone and I idiot reported him to hand over with all the papers. (On Monday I report him immediately around”Has he still said a day later I get an e-mail I should pick up cars from him the car would have more defects as I described and other Macken “M otor this Antrtiebswelle das etc. ” I wrote in the auction “Please take a look at the auction bid” and that the “car has optical defects” ” In any case he says if you do not pick up the car I do not log off the car.And he wants to initiate all legal steps if I do not take the car back. I would have it (arglistig deceived) engine and gearbox were I.O. no oil loss or sound Achja the return journey from the good man was about 600 km I must have car Take back ? Thanks for reading and answering Greetings Kaish