I’ve been through the same problem myself; it’s a real head banger having some lazy XXXX steal your hard work & peddle it as his own.
If the ebay mischief resurfaces again (I see the current thief has agreed to stop) one way to counter it (or deter it) would be to have a couple volunteers post “legitimate” auctions using the same search terms.
Any proceeds can be donated to our beloved Author and/or to whatever worthy project he recommends.
Don’t forget that Morgan has a PayPal donation link on his website.
How about we all get on board & send a big “THANKS!”