I stopped using eBay when they canceled my auction because I had included a link to the PDF manual (on the manufacturer's site) of the phone I was selling. This was around 2006 and I assumed their idiotic policies would quickly see them replaced by a better platform, but for some reason this has never happened.
The power of ebay resides in being able to find any product that comes to mind on auction at virtually any given time. Therefore, no one I know bothers to check the competition (if it even exists) before they bid. The same known problem occurs with Facebook regarding friends. I don't see any solution, this ease of use is more important to most customers than ToS.
Depending on where they are in their fiscal year, eBay seems to alternate between favoring buyers, or favoring sellers. I've used them through several pro-buyer and pro-seller cycles, and their actions were often unexpected, much like your PDF example.
