Finarvyn wrote:I recently saw a copy sell on e-bay for $27.50, and others have gone for something similar to that.
*g*. Was that the copy with the bullet hole?

The 1975 ed. is very rarely seen and I've misjudged the price a couple of times, now.
Presuming the paper aging is relatively even and there are not too many other faults, high side of $45-50 would be reasonable,
IMO.
(Do you have a pic. of the book?)