I recently picked up a collection of stamps at a garage sale $50 3 books filled with Stamps One dedicated to US "The American Album for United States Stamps" 1938 the other two are World Wide with US in them both, "Modern postage stamp album", 1940 and "Postage Stamp Album No. 2058" I don't know the year but it's extremely old. All the Albums have plenty of Used and Unused stamps in them, mostly from the late 1800's to early 1900s.
Here are the oldest from the dedicated US Album. It was noted that the collector (the woman's father) properly ID all the US stamps, making my job easy.

Cat 184 - 207 and 210
It's going to take a while to go through it all but I can't wait