This
Susan B. Anthony dollar 1st Day of Issue cover was issued as a set of three. Each cover contains either a 1979 P, D, or S Anthony Dollar and is postmarked on July 2, 1979 in Philadelphia, PA (19104), Denver, CO (80202), or San Francisco, CA (94101) respectively. Each cover has a 13¢
Indian Head cent stamp and either a 3¢ Susan B. Anthony stamp ("P" cover), a 6¢ Woman's Suffrage 50th Anniversary stamp ("D" cover), or a 3¢ Election Box stamp ("S" cover). The set of three comes in a blue paper cardstock folder.
http://www.smalldollars.com/dollar/page09.htmlIt includes an Uncirculated
Susan B. Anthony dollar - the first U.S. small-sized dollar, struck from 1979-1981 and one last time in 1999. Plus, your set includes a Mint 1936 U.S. 3¢ commemorative stamp featuring this well-known suffragist's profile. You would have to do some research on sold listings, perhaps $20-30ish for the complete set of 3 with coa.
https://mavin.io/search?q=Susan+B+A...1979+Dollar# Individually they also sell but for less. Individual coins if the same as standard releases can also be removed, evaluated and sold or potentially graded. Keep in mind that values after grading dont typically exceed the grading fees until you get past MS66 or so to start.