Help With Information And Any Value Of Unused 1930's Stamps?

Good morning forum members,

I am a new member and need your help with any information on these stamps, as well as any potential value. I found them in a coin collection I purchased. Your help is greatly appreciated. I have attached pictures of half of them. They appear to be from the 1930's and they are unused.

I am including some of the information on the stamps as my images were too big and I couldn't upload all of them and could't quite future out the image optimizer. Please help if you can. Thanks much, Troy

Orange rectangular US Airmail 6 cent stamps (total of 2);
Wisconsin Tercentenary 3 cent stamp (1634-1934) (total of 1 stamp)
Grand Canyon 2 cent stamps (total of two stamps)
Maryland Tercentenary 3 cent stamps 1634-1934 (total of 18 stamps)
Century of Progress Chicago 1833-1933 III cent stamps (total of 17 stamps)
Mesa Verde Stamps (total of 1 stamp)
Mothers of American Stamps (total of 13 stamps)
Mt. Rainier (total of six stamps)
Connecticut Tercentenary 3 cent stamps The Charter Oak 1635-1935 (total of 5 stamps)

Minimal value for the postage stamps. I can't comment on the Camp Dewey stamps, never seen them before. Assuming they are some Cinderella.

try putting one of the large blocks of the Dewey cindarella on ebay in an auction style and see what it brings. Especially so if the stamps are with gum and not damaged. I see 2 lots on ebay with this cindarella and most are asking about $4. with several watchers. The "stamp" is commemorating Adm. Dewey and the camp in New London Ct, which is the submarine base at Groton. Interesting looking navy theme and may surprise in an auction.

The Catalog values are from my Scotts US Specialized 2012. The prices are for Mint, Never Hinged, Very Fine stamps. Typically they sell for about 25% of catalog.

Thank you very much to all who responded. Your help is much appreciated. - Troy