One last thing, ebay is no longer a place to sell grandma's china set, they are dominated by large players anymore selling hundreds of thousands or even millions of $$ per year. Its just how it goes. They likely consider a seller like me to be a nuisance, lets say $25,000 per year +/-. They tolerate me, I tolerate them.
All of the on line sales outlets have issues, and none give you the access to the number of global buyers that ebay provides. And ALL of them WILL issue you a 1099, cross $600 in gross receipts, and you will be getting a 1099 whether you sell here on this forum, use PayPal to collect funds at a garage sale or whatever.
To me, the decision to walk away from eBay will be driven by one or two things:
1. I stop buying. Right now, its too much "FUN" finding that item that can return a nice profit.
or 2. I find a better outlet for the stuff I find.
I've sold a lot of oddball stuff, from a Ray Kroc plaque from a McDonald's restaurant, to a mountain climbers down outfit, to a large print bible, and so on.
If you are into this kind of thing (finding and buying deals), and you aren't making money, you are either buying the wrong stuff, or paying too much for it. Buy what other people want, and pay a low price for it. It's just that simple.
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Please don't confuse ebay "asking" prices with "selling" prices. Many sellers never get their ask price. some are far from it. Value is determined once an item actually SELLS. Its easy enough to check SOLD prices.