Ebay Resells

I do believe Ebay stuff is being resold on a continuous basis. Example. A month ago I got a Trivial Pursuit game on Ebay. After purchasing it I found that the questions were just way too hard, so I put them back up on Ebay. And within 2 days I had sold it again having only lost a couple of dollars. Call it rent-a-game.
Now I’ve got this camera which I bought on Ebay. The auction description said the On/Off button occasionally stuck. But I didn’t expect it to stick that much. 90% of the time it will not turn on. So here I am with a inferior camera. Do I dare to complain to the seller? Do I try to sell it back on Ebay and risk negative feedback if someone has the same problems I’m having? I don’t know. I’m going to face it. I was burned on Ebay and will probably be burned again.
So I’m thinking Ebay is just a bunch of stuff being resold over and over again. Or maybe its just a bunch of people going to garage sales and reselling the junk on Ebay. I can’t tell at this point. Who really makes money on Ebay? Beanie Baby sellers? Fooling people into believing that they HAVE to have the bean stuffed animal. The Emperor really has no clothes.