Ebay scams can involve almost anything, and rely on buyers not reporting issues. I once bought an uncommon Spyderco knife (retail $200) for under $100. However, the product photo was straight from Spyderco’s website.
The knife arrived and it looked odd, but was generally close to what I had purchased. Then I found other listings with the same actual model for $25-$50, and a long warning video on Youtube about spotting fakes. So, I returned it for a refund and reported the seller. After that I sought out and reported a couple dozen more fakes on Ebay.
Clever scammers will deliver a product and count on buyers to be ignorant or lazy. You do indeed receive something of value, but nothing close to the original product’s value. There have long been “voodoo electronic” black-box devices with no functional value, but they continue to be sold because only a fraction of buyers return them. Those compulsive shoppers who keep a useless device (often unopened for years) provide enough profit for the business to endure.