I only ask because I’ve had a very good experience with eBay over the past five years of using it as an Amazon replacement.
I think one thing showed up damaged because it was poorly packaged, and they gave me a full refund.
One lister sold me bootleg gameboy carts (which I should have noticed from the listing if I did an ounce of research), and they accepted a free return for a full refund.
Probably the scammiest thing I see is people clearly just drop shipping from Amazon through eBay. Which is odd because it’s often for the most random things (like random bolts or whatever).
https://www.smbc-comics.com/comic/age-of-exploration