This is all from memory, which may be faulty, but when I started with ebay, most of my sales were in the $10-$50 range. At that point, there were listing fees of about $1-$2 plus "final" fees of 3%-4% not including shipping charges. Paypal fees were only about 1%-2%.
After a couple of iterations of "revisions" (from my perspective) over the course of a decade or so, listing fees have pretty much disappeared (for me at least, but maybe I somehow just graduated out of them), shipping is now part of price (partly to encourage "free shipping" which I prefer), and seller fees are pretty much at 10% of final price including shipping.
Paypal is about 3% + $0.30 per transaction (except for "gifts") and if you go the gift route, there are no guarantees for anybody and Paypal does not list the address of the recipient (because who gives money to strangers or asks for a gift to be returned?).
These fees are totally rapacious since it costs ebay and Paypal an infinitesimal amount to "host" these transactions, but it is still well worth it because they are "the only game in town". Seriously, how else can you place your wares in front of the world, literally? Ebay alone is the most universal worldwide marketplace, and you are almost sure to get your best price there.
So, after all the hating and anger is expended, I still use ebay and recommend it to everybody else as well.
But if you see one of my sales and want to contact me directly through Geekhack so that I can bypass ebay's fees, I will gladly give you a 5%-10% discount!