eBay is rife with blades and other weapons counterfeiters from Pakistan. They go to the artist's Pinterest and online stores, steal their photos, and then sell very poorly made counterfeit copies of them online, most often, using the artist's own photos in their listings. We have been the target of this scam. I have had a lot of success getting eBay to remove their listings by reporting them to eBay's VeRO program. I keep finding more though, so it's like playing Whack-a-Mole.
We should have been watermarking the photos we posted over the years. Lesson learned.