These books are worth the weight in Gold or nearly so: 1893 Issue autioned at CRRM 6/1999 at $116.24, and at Mauher Auction 11/20/1999 at $200.
I got mine at $80, so if you look around, deals can be struck. I will buy all that are offered.
These are Capital Gain items so retain purchase cost records for when your estate is closed for the tax man.
If your interested in typing up more, I suggest DL&G, and/or EBT for this list.