It's great that you brought up "Sled Driver", I'm actually currently saving up to buy a copy. Brian Shul still has new copies available on his website for $250. I think the copies that go for very high prices on eBay are the first editions or some of the special commemorative versions.
May I ask your opinion on the print quality of "Sled Driver"? I know Shul is a photographer, in addition to being a former SR-71 pilot, so I assume the photographic print quality is quite high. Have your read his companion book "The Untouchables"?
The photos in there are nice, but I would say it is on par with most coffee table style books that I've seen. Wonderful photos, but the print quality is about the same as most books of that era. To be honest, I got so caught up in the stories he tells in there that I can't recall a lot about the photography - I will have to revisit it and check it out.
Great that he has started republishing the books again. I remember about 10 years ago when it was out of print, copies were going for about $6000+ on eBay !! o_O I thought I was sitting on a goldmine. :D
I haven't read "The Untouchables", but will put a copy on my wishlist for this year. Can't get enough of books about great planes and great pilots.