I can recall, around 2003, a guy with a tractor backhoe turned up on the old ACMOC forum, telling us his backhoe had been stolen and to look out for it. I STR he was down Georgia way.
I asked him to post details - model and serial number - which he did. So, a few days later, with some time on my hands, I started searching for this particular make and model of tractor backhoe being offered for sale.
Amazingly, I soon came across an ad on the WWW for this same make and model tractor of tractor backhoe being offered for sale. What was amazing, the seller had listed a serial number of the tractor!
I was looking at the S/No and thought, that is very close to the stolen tractors S/No - the differences were simple on 2 numbers, like an "8" where the stolen tractors number was a "6", and a "6" where the stolen tractors number was a "0".
I came back to the forum and advised the guy that he should check out this tractor backhoe that was for sale with a S/No so close to his. So he did (it wasn't all that far away) - and lo and behold, he came back to the forum telling us it definitely was his tractor backhoe! - and he'd called in law enforcement - and they'd not only recovered his tractor backhoe, they'd discovered a whole gang of equipment thieves - plus a big variety of other stolen equipment!
He was blown away by my internet detective work! - from the other side of the planet! But it was really just pure luck that the thieves were stupid enough to offer up a piece of stolen equipment so quickly, and advertising the S/No as well!