Seen on eBay (for way too much, $240), a CD of the Release Candidate of Mac OS X.
I say way too much because a set with two discs (the installation disc plus the tools disc) recently went for $32 here. And if you’re curious to see what’s on the CDs, everything is available on Macintosh Garden. As for the rest, the seller claims the case is still shrink-wrapped, but since it’s a type of case you can buy in packs of 100 on Amazon, I’m not convinced that’s actually true (at least not the original shrink-wrap).
