Watches
I collect and repair inexpensive mechanical watches. Before I knew what to look for, I accidentally bought a counterfeit Seiko 5 from Ebay. When I got it, discovered that the rotor was engraved "Sevesteen Jewels", and the movement was one of the very cheapest, crappiest Chinese automatics--Sort of like ordering a Taurus and getting a Hi-Point with Taurus markings. I did what I could to hassle the seller, and kept the name to use on watch forums.