Yikes!!! That is too expensive. I just bought the same books - about the same condition - on eBay from a guy in Hawaii for $50 + $23 shipping. They are wonderful!!!
And then my wife bought me a repro set for xmas, which is a nice, bound paperback copy of the exact same info. The only difference is the original pages are glossy and the pictures are much easier to read - the repro images have some dithering/half-toning that makes them less clear. And there are a couple of diagrams in the original that are fold-out pages, whereas in the repro book the diagrams have been reduced in size to fit on the page. The repro set was $99 plus shipping.
Maybe I got really lucky, but I absolutely LOVE my blue books. There is a fold out diagram in there that shows all of the chassis dimensions - hole to hole - front to back, side to side. This will help get our cars right back to the factory specification!!!