Yep, just a guy interested in buying the Jeep.
I've been out of work on disability for several months now, and when that picture was taken I had just left for a doctor's appointment. Otherwise I would have heard him pull in the driveway. My parents picked me up, since I'm not allowed to drive with the medication I'm on. When I checked the camera a few days later, I wondered what that guy was doing, so I went outside to check and make sure nothing was out of place. I found the note on my windshield and called the guy. He confirmed that it was him in the picture when I described the car and clothing. I told him I wasn't interested in selling the Jeep, and he thanked me for calling him back.
The problems I've had have definitely been with local kids. A couple of the things that were done made it easy to know exactly who was behind it, but I don't want to say anything to the parents without something more substantial to prove it was their kids.