You got lucky.

No he didn’t.

eBay relies on buyer confidence to continue to exist. They’re essentially the only game in town for a well known world-spanning used stuff selling platform, so they know sellers don’t have a choice and they don’t give a flying fuck about the seller’s bottom line. eBay sides with the buyer. Always. It might take some time, it might take some extra emails, but ultimately you will always receive a refund no matter what if you as a buyer complain. This means that it is always possible to get your money back if you were overtly scammed by an eBay seller, and this is because eBay knows very well just how prevalent seller-side scams are on their platform.

But this also means that the buyer can concoct any lie or pull any scam themselves no matter how obvious and an honest seller ultimately has no recourse and will be out both the money and the product. A buyer can lie and claim the product never arrived, swap it for a broken instance of a similar item and ship it back to you claiming you “scammed” them, or even just apply your shipping label to a brick and mail it back to you and eBay won’t care. They’ll close the case, take the money from your account, and refund the buyer their purchase amount while the buyer keeps the item. It doesn’t matter if you posted your item as “no returns.” All the buyer has to do is say it was defective, damaged, or didn’t arrive if they have buyer’s remorse or simply feel like ripping you off.

For this reason I don’t sell anything with any value whatsoever on eBay. Only literal junk that I got for free via work, like parting out broken equipment that has a net $0 cost for us, etc. If I turn a buck on it, fine. But sometimes I don’t, and I have seen buyers try every trick under the sun, and every time eBay sides with them in the face of all evidence to the contrary. So you will ultimately always lose some, and if that’s going to impact your bottom like you just can’t sell on eBay.