Why is so hard to find a print version of ASV bible?

I started to study the bible recently, and I wanted to buy a print copy of the American Standard Version. The bible is available online but I wanted a print version as a backup. To my surprise the bible is out of print. I looked online for print copies and only found one or two sellers. Why is this bible not widely available in print form? Is it because of the expired copyright? The KJV is in the public domain outside of the U.K and is available in print form. It is difficult to find a second hand copy as well, even though I understand that millions of copies were printed in the past.