There is nothing cheap about that book these days. A quick search shows one would be lucky to get a copy for less than $400.
Someone today mentioned he was looking for the "Guns of Dagenham" book. That one is now listed at up to $2,000 on some sites.
I have been making a mistake thinking my guns are any kind of investment. I should have been buying multiple copies of these books. I say multiple because I will be buried with the copies I have now (Gives me something to read in the afterlife).