@Achtung T Shirt bill
You sell mass quantities of cheap stuff? Then, there's probably not a lot wrong with ebay. That's who they cater to. They have geared up to reward sellers of mass quantities of cheap junk and jettison low volume sellers of higher ticket items.
If you sell low volumes of higher ticket one-of-a-kind or collectible items, Ebay and their gangster partners at Preypal are a death trap. You won't be able to average out the low DSRs from the buyers with Napoleon complexes, who get their jollys that way.
You won't be able to survive the monthly fraudulent and/or naive international buyer who opens an "item not received" case against you 2 weeks after you've shipped something to Germany via USPS 1st class or international mail because the alternatives are too expensive.
You won't be able to survive paypal giving the above crybaby buyer a refund, on your dime, within a week of his opening the claim, even though you can prove the item was shipped and is most likely sitting in his country's customs office waiting to be delivered to him.
Once he is paid off by Preypal, he will go pick it up and get it for the price of the duty. Meanwhile, since he's already gotten his refund, and his merchandise, he will neglect to cooperate with you when you ask him to sign and return the forms required by your shipping ins. company.
Then, to add insult to injury, Ebay will allow this scammer to give you low DSR's. But they will keep their FVF. So, you will be out your merchandise, Ebay and Preypal's fees, and the charges for insurance and International postage.
If each month you sell hundreds or thousands of T-Shirts, even internationally, you can probably absorb 10% of your sales ending up this way.
If you sell a couple dozen $100-$300 items per month, you can't.
But, if you rely on auctions to return a much higher price, and you rely on international sales, you don't have much choice in the matter. You are in the same position as a dependent but abused spouse. And like a wife who has seen her husband change from a nice guy to a monster, you look for an escape. But it's a lot easier said than done. And you will probably, in the long run, die due your lack of options.
None of the alternatives get even a fraction of the buyers that ebay does. How many sellers they have, or items that are listed, is irrelevant. I would rather list on a site with 5 sellers and 10 million buyers, than list on a site with 10 million sellers and 5 buyers.
The problem is that 10-20% of those buyers are stupid, naive, malicious and/or scammers. Perhaps that is true of any venue. But the difference is, unlike other venues, they are aided and abetted by their accomplices at Ebay and Preypal who's policies absolutely encourage fraud and abuse. If you sell mass quantities of cheap junk, 10-20% might be an acceptable loss ratio. For the rest of us, it's not.