Oh, by all means, in the high tech controlled light-free environment. And, horrors, don't alter their condition by turning on the lights and consulting them.
Brown vols. show up periodically at about $25 each for the ones with songs and ballads (Vol. 4-5); I picked them up recently at that price.
I still prefer the newer Randolph edition at $125 with the nice dustjackets and no marks to a used 1st ed. for not much less. How long they will stay in pristine condition is another matter. The very few missing copyrighted songs make me no nevermind.
WYSIWYG, I picked up a copy of "Songs That Tell A Story" for $3.00. For you only, I will resell for $100 (higher to others). Cackle, cackle!
It is only 75 pages, and I will copy (if it is the right one). It ain't rare, but most bookdealers don't list items like this because there ain't profit.