I've been on eBay as both a seller and buyer since the beginning. I very rarely sell anything on eBay anymore, too much of a gamble.
(1) As noted at beginning the rules are always changing and not in your favor
(2) No matter how crooked the buyer, if he files a complaint he wins, and your Paypal account is frozen until you've returned the money. I had one guy wait 2 weeks to pay, then complain the camera sold for parts was broken, filed a complaint, but never returned the parts. Ebay froze my paypal account for two months because I wouldn't return the money until he shipped the camera back.
(3) The last item I sold they charged me the same fees on the shipping charges. The shipping and insurance overseas was about $60 so they charged me another $6 on the shipping. Since shipping did not go through them how can they charge for a service they aren't providing.
(4) Have you noticed that most sellers are no longer individuals but eBay businesses charging an arm and a leg. For example go look at price they want for Lyman molds, you can buy it cheaper at Cabelas or Midway than on eBay.
(5) Having something to sell? Armslist, Craigslist, Gunbroker, there are lot more players out there than ebay.
Finally, all these "rules" to protect the buyers because they are so many rip off artists, in over 20 years I only got screwed once when buying something. And that pretty much goes for all mail order business I've done for 40 years (I buy and sell high end cameras,Leica, Rolleiflex,etc). I can't tell you how many times I've been screwed by buyers, and I mean robbed, ripped off, etc.
Ok, rant off.