I got robbed twice myself. One time a guy that had looked at an air conditioner came back and stole it off my parent's patio.
Another time I went to deliver an AC. Guy had given me his cell phone number. When I get there, it was obvious that he was a drug dealer. Some of his cohorts were nearby with bats and chains, baggie transfers were going on. He looks at the AC and locks it in his trunk. Gives me $20, I was selling for $100. "What are you going to do about it?" he says. I thought about calling the cops, but just left.
I decide to invest another $7 in having some fun with him. This was the 90s - before the days of Kregs, and cell phone calls were costing 40 cents a minute. Sony had just come out with a new Playstation, and it was sold out everywhere. I put a 7 day ad in the paper advertising "$40 with 3 games" with his cell number.
7 day ad, it was no longer in the paper on the 4th day.