I bought it new at a discount bookstore in PA for $14.95. The regular price was $19.95, I think.
About 3 years ago when I was really broke I took a long hard look at it and decided the money was more important than the book - especially when I rarely used it and when the local library had a copy of it. So I put it on eBay - and got about $225 for it.
Selling it turned out to be the right decision for me; I really don't miss it. But I do wish it would come back into print, just for the reason given in the first post here. IMHO, it is the definitive guide to knitting. (When I was writing the auction post, just to give people an idea of what was in it I counted the number of different cast-on methods it had. There were 32. Hiatt really put a lot of effort into that book.)