Here's a good one for the community:
I had a good customer of mine pull in today with a beautiful '19 Silverado 1500 High Country sitting on a 3" lift. 39k miles. He bought it from a "friend" down in TX (I'm in MN) and drove it back. He paid $65k, or so he claimed.
His issue: the truck would randomly not start. Hit the button, nothing. Sometimes it was fine, sometimes it would start but the cluster would remain dead, sometimes it would start and flash warning after warning, Scanning all systems reported just about every comm. code one could imagine.
Before jumping into a long, drawn-out diagnostic process, I decided to locate and disconnect the rear harness for the parking sensors. History has proven time and again that the rear park assist modules on MANY GM vehicles fail and pull down the GMLAN bus. I located the connector on ProDemand, and slid underneath....
What did I find? A truck that had quite obviously been rear-ended and repaired in a way which rivals any salvage vehicle I've come across in my career. From the missing bed-to-frame bolts, to the crushed exhaust, to the damaged left hand shock. After some investigation, it became apparent that whoever "repaired" the truck did nothing but paint a used box, pull the frame just enough to mount said box, and Bondo the LH C-pillar.
The worst part? The truck had a CLEAN Texas title. I ran a Google search on the VIN, and immediately found the auction listing for the truck. It was sold last June in OK for $21k. The pieces all fell into place once I saw that: bought in OK, transported to TX, repaired, then inspected and issued a clean TX title. Thankfully, my customer hadn't signed the title yet. I don't know if he handed over any money, but either way he was beyond thankful for our help.