Buchner Defenders and Offenders Album

hi all, i have someone i can trade with for something i am selling and he wants to trade a Buchner Defenders and Offenders Album, the albums has edge scuffing, has a spine that is not damaged and is complete with all pages. The pages see slightly warped due to ageing. I am trying to get a steer on what it could be worth, if anyone can help. If i get it i would plan to sell it on. Its a great piece, has to be said from 1900. I know the cards are rare, dont know re album value