How much is a 1926 edition of Napoleon by Emil Ludwig worth?

I have the 1926 edition from Garden City Publishing and just checked out the price on line. While you can find dreamers selling it for $49,99 on ebay, you can get a number of copies on Alibris (the go-to place for rare and unusual books) for $1.99. In case you haven't had a chance to read the book, give it a go! It is a treasure despite it's monetary value. The book reads like a novel and is a fascinating account of the last Emperor of Europe.