Are you fucking serious??!
One of those went for auction for £4,500. Think it was 2007 or 2008. I'm pretty sure there wasn't anything 'special' about it though it was a while back.
Edit: Actually sorry that one was signed by Warhol. One normal one first pressing did sell for £700 a while back though on eBay apparently.
I also know that one of the bootleg pressings that started with European Son went for $155,000.00
shiiiittt i might end up getting rid of mine if it's worth that much haha. it's in great condition too