ROFLMAO
That car is straight up stolen. 'Tenant left behind...' Dude went in and found keys when he evicted more like. CA law only allows for contents of dwelling. He could keep the keys, but he doesnt have legal rights to the car. On the other hand if it was a storage shed..... but then the laws get specific about the buyer/owner of shed has title rights with the change, but still guy would have to do the foot work.
If he was in LA I would go 'shop' it just for fun, then call the cops on his arse! :Beer