You've cornered 25% of these proofs known to exist? YEAH BUDDY! The closest I can come to that is owning 2 of the 26 overrun Skeleton Crew copies. That's a measily 7.6%
That's one of the weird things about proofs--no-one (except MAYBE the publishers, and they're not talking) knows how many they actually print. Don't forget, most if not all the proofs go to reviewers who often discard them after reviewing the book. At least before the Internet and eBay. I don't know how the publishers determine how many to print but they do some weird things. A good example is the more current Under the Dome. Scribner published a (very) limited number of the light blue proofs and sent them out. They somehow then discovered they needed more, so they began sending out hard covers (without dust jacket but with a sticker on the back with an ISBN number) to more people. I've also heard that they published a very few hardcovers with dust jackets with "Proof" printed on the back of the jacket. I don't have one of these.
As soon as I get some ARCs (if I ever do) I'm going to use these to build a dome of my own (where the books and the authors play with seldom a discouraging word).
Amazon.com.UK was kind enough to send me 4 of the same covers, which is exactly what I expected would happen.
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