I didn't buy the Berg Book, but I believe it was +$30.00. (Oops!, I just went to the Web Site, it's $50.00!)
Powells has a web site and you might be able to find it there. Not everything in their inventory is on the site, but you can contact them directly. A few years ago they got a copy of Michael Canick's "Price Guide" which ruined it for us locals cause you could pick up real bargins every now and then -- like "Cards as Weapons" for $8.00! Now they go by it.
I think you can get there here: www.powells.com