I'm 99% a buyer (hundreds of items bought, and three items sold, and never again).
I sold a Mavic 2 Pro drone with 5 batteries. The whole process was a mess. Buyer complained that it didn't come with the CrystalSky tablet in one picture (that was only added after the buyer started bidding was requested BY the buyer, to show Flight Logs, was explicitly disclaimed as being a part of the package, and was not in the receipts I sent the buyer). After that, three weeks later:
"The batteries don't work."
"Any of them?"
"Nope. I want a refund."
Note that two of the batteries were less than 4 months old, still in warranty.
He then stated he wanted a refund of $800. Bear in mind, 5 -brand new- batteries would be $670.
No evidence was shown. I stated I'd like to get the original batteries back, as I'd be able to get them replaced under warranty or possibly repaired and recoup some of my money (I was skeptical there was any issue, but still). He agreed. I asked him to send me an eBay message acknowledging that the partial refund was contingent on him sending me the batteries back and that he accepts me disputing the refund if not.
He does so.
Refund is sent (for about $700, to include his return shipping costs).
Less than an hour later I get a message, "USPS says they won't ship damaged batteries so I will not be returning them".
I then suggest we meet in person to exchange them (I live a few hours away, not convenient, but still, $700...). He umms and ahhs, "How will I be able to prove that I gave them to you in person?". I suggest we do it in a police station (his local PD even welcomes people to use their lobby for CL, etc.). More umms and ahhs. "I need to contact eBay support to see if they recommend this." (eBay has a literal FAQ page describing how they recommend doing in person sales, and refunds, and documenting it, and how they support it). "I never heard back from them so I'm not sure what to do". I point this page out again, and he goes silent.
I open a dispute. No evidence provided for damage/faulty goods. Multiple instances of the buyer trying to show something/anything was problematic with the listing. Not abiding by agreement, refusing/avoiding any method of returning damaged items.
"We have closed your dispute. Based on our review, the buyer is entitled to a partial refund for damage. He is not required to return the damaged items".
So he ended up with a Mavic 2 Pro, with less than 20 hours flight time, 5 batteries, for in the order of $950, all told.
eBay is on the side of least resistance, damage or liability, financial responsibility to eBay, no-one else.