Elliott C. Back:

I’m personally convinced that eBay hates its sellers, an ironic proposition that seems to undermine its primary business model of creating an online marketplace.

He’s not alone. I used to sell on eBay all the time and stopped once they made it nearly impossible to leave negative feedback on buyers — eBay caters to the buyers thus forcing sellers to take on more risk. I refuse to buy and sell on eBay because of this.