I found two copies of Skeleton Crew at a local used bookstore the other day. Different boards and covers. One cover wrap did not include the price and the copyright page did not have a number line. Both clear indications it is a later edition. However, the second copy had both.
Is it "worth" something? I dunno. Probably not much. I paid $1.99 for it. But a find like that makes me pretty happy. It appears to go on ebay for $15+. I also have a British first edition of this book. (I'm not sure why I bought a British edition of that particular book, except that I thought the cover cool.)
My favorite story in Skeleton Crew is by far The Mist. The book as a whole remains among my favorite of King's short story collections. As Kevin Quigley pointed out,
"Skeleton Crew is a frustrating instance, because a perfectly terrific version of Skeleton Crew on audio simply doesn’t exist anymore. The collection Skeleton Crew: Selections is the only version available on audio, which is insane. Sure, the narrators are fine – King reads “The Raft,” and it’s awesome – but there are only four stories. Why let the terrific Frank Muller version rot in purgatory?" (interview with Kevin Quigley on THE MIST, at talkstephenking.blogspot.com)