Guitar pick

Now, this isn't slane castle related, but I couldn't think of anywhere else to put this. For those of you who have read Scar Tissue, you may remember a brief mention of Dave Navarro using a pick that listed the guitarists that came before him, then his name, then a qustion mark. I, through the magic of ebay, have obtained one of these picks. I am certain that is not fake, it was only advertised a a pick he got a concert about ten years ago and I don't think he realized the value it could have to some people. Anyway, I was just wondering, how much do you think this pick could be worth?