The watches exist. It’s a practice that happens almost exclusively in Japan and predominantly on eBay. You will know you found an example when you search for a watch on eBay and find a dozen +/- Japanese ebay stores all selling the exact same watch, using the exact same pictures, all with slightly different (but marked up) prices. How it works is, these flippers will find a product on a platform like Yahoo Japan (auctions), Mercari, Rakuten, etc, which is the perfect hunting ground as many of the sellers on those platforms won’t ship internationally without the buyer going through a Proxy. These flippers will relist the item for significant markups, all hoping an unsuspecting buyer will buy it from them. They will then take the money from the sale, attempt to purchase the item, forward it to the unsuspecting buyer, and keep the profit. Or, and this happens often, the item was sold out from under them on the original platform, they can’t purchase it, and cancel the sale.
It sometimes happens where these flippers will sell an item where the original source is also on eBay. You will know you have found the original source when you found the cheapest listing, as, again, all the flippers have a significant markup. Often times a simple reverse image search will lead you to the true seller of the item. If you ever see members on the forum say they wish they could exclude Japan from their eBay searches, this is almost certainly the reason why. You can find the same various watches listed dozens of times and it becomes annoying to scroll through those.