Just had this same sort of thing happen today. I picked up an old huge ball mill/tumbler/mixer (not sure exactly what it is) this morning, came home and parked. About an hour later I look out and there's a little Ford Ranger in the drive and some guy is checking out the back of my truck. I went out to see what was up and he said he be more than happy to haul it off free for me. I told him no thanks and he stuttered around but he left.

I'm not too worried about because I don't think he could steal it if he wanted too unless he had some help, but just to be on the safe side it's log chained to the bumper for the night.