I spent the better part of 6 hours getting all of the crap you need to craft a Staff of Herding (it's white, wtf is it white?). I went in a couple of times with my barbarian, then went off to do other stuff. At some point apparently I was going click crazy at a vendor getting rid of crap, and I sold it. I dunno when or to which vendor, but it's gone now. Disgusted with myself over it and disgusted with Blizzard for allowing it and not making it a color that would stand out as something special that I shouldn't sell. The thing is bound to you so you can't auction it or give it away, but apparently the fat guy with the health potions can buy it from you.
I may go back and run to get the pieces again, not sure, just thinking about doing it pisses me off at this point. Anyone else sold theirs in a selling frenzy?
Edit: Apparently you can't sell it, so I must have dropped it at some point thinking...well, not thinking obviously.