Comprehensive Collection of Adam Bert First Day Covers, over 2,500 covers, mostly not cacheted, on the usual smaller (#5) envelopes employed by Bert, in about 20 albums, begins with 620-21 to about 1990, loaded with better items, including complete set of prexies (in blocks) and Famous Americans, high values throughout (including Express Mail), booklet panes, the first Bert cachet (#645), better Airs including C18 (2 covers), etc. F-VF throughout, a matchless collection.
Estimate 1,500 - 2,000

Comprehensive Collection of Walter Crosby cacheted First Day Covers, over 500 covers in albums, mostly different, with duplication coming from cachet color varieties, including 785-94, 859-93 (several sets), C25-31, etc., also includes Akron training flights, many with the flap toning endemic to Crosby covers, F-VF.
Estimate 750 - 1,000

Colorano Cacheted FDC Collection, several hundred, seem to be 1970's and 1980's.
Estimate 150 - 200