This has been an interesting thread - some old, some new. My less than .02 worth:
I still buy and sell on Ebay (have for almost 20 years) - slip joints and Randalls. However, it is still (as it always has been) shark infested waters... mostly with slip joints. My favorite description is "condition is used' or "look to photos for condition" These descriptions usually hide functional bads, like weak springs, wobble, etc. Even so, I have returned two in the last month (and I almost never return an item) that had glowing descriptions that turned out to be completely bogus.
For me, trading on the forums has been much better in the honesty department than Ebay. I see more of a tendency to describe "faults" that might otherwise go unnoticed.
On both venues, Ebay & forums, it is what it is - so complaining is pretty much a waste of effort. I just hang out and wait to hit a patch that is good for me. I do like buying on the Blade forums, best. The descriptions are honest and most members will communicate and are willing to be flexible. The forum has grown tremendously since I joined and provides much, more than just a sales platform. I have been all in on being a paying member whenever I am active. As such, unless I hear some compelling reason to do otherwise, I also favor dealing primarily with paying members...