I feel the exact same way about a bunch of Childhood of Famous Americans I found discarded from a public library. They seem like such treasures to me, but I wonder if anyone will actually read them. I am going to hang onto mine for a while and see if any of my kids will read them as they get a bit older. My son has really taken a great interest in American history within the past two years. He is 10 now. How old are your kids? I am find him reading much more this summer than in the past.
If you do decide to sell any, I am interested.