Any image that someone makes is protected at the time of creation. Images posted to eBay do not become Public Domain just because they are posted there. As soon as an image is on eBay it's also protected because the eBay site is protected.

But the bottom line is, by posting an image somewhere it doesn't become Public Domain!

Now to the other side, which it seems some people just can't understand. The Chip Guide is a collection and a database, which in the Terms Of Service and use, says if you want to use an image, you need to credit The Chip Guide. Is that such a terrible request, that some people have created a cause and can't get over it.

If you want to use a TCG image, please give them credit as the source. Or don't use those images.

If The Chip Guide hasn't adopted a Creative Commons License Notice, they need to. Otherwise, it's just asking. The site should say:
By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.

CC license explained: https://creativecommons.org/licenses/by/4.0/

Which in short says, you must give credit to the source, or you can't use the free images.

If TCG is using an image from a source and the owner doesn't like that, they can ask for it to be removed. If TCG doesn't then the next step is a DMCA filing. If they refuse, then there is a small claims court where the owner can get compensation for the illegal use. 1-2-3 in that order. You can't just jump to #3.

I don't trust people on eBay who use generic eBay images or borrowed images. I still consider them stolen. As collectors we'd like to see the actual chip we are going to get. If I buy a used camera, I don't want a stock image, I want to see the actual item. Just happens that the crooks and thieves, use stolen/borrowed images, because they don't have the actual item.

DMCA Explained, good reading: https://www.itpro.com/development/web-development/368194/what-is-dmca-the-digital-millennium-copyright-act-explained

Personal Opinion as I deal in photos and graphics daily. DMCA is a toothless guard dog that doesn't bark. But that's the way it is.

Creative Commons is used all over, and the idea is about, credit and attribution for the source. Look at Wikipedia, the images are CC.