Postal Commemorative

can someone tell me if these stamps are valuable?

postal service employees
1973

The short answer is: no, they are all quite common.

When selling to American collectors it is useful to identify your stamps by Scott catalog number. In your case, these catalog numbers are:

postal service employees 1973: 1489 – 1498

air mail 1985-2000 and olympic mint not used (1976):
Olympics: diving 1695, skiing 1696, running 1697, skating 1698
air mail 80 cents Mt. McKinley: C137
air mail 44 cents Trans Pacific: C115
air mail 50 cents H. Quimby: C128

flowers 1981-99:
18 cents rose: 1876
18 cents camellia : 1877
18 cents dahlia: 1878
18 cents lily: 1879
33 cents bird of paradise: 3310
33 cents royal poinsettia: 3311
33 cents gloriosa lily: 3312
33 cents chinese hibiscus: 3313

commemorative 1958-1959:
Macinac bridge: 1109
Freedom of press: 1119
Fort Duquesne: 1123
dental health: 1135
Kossuth: 1117
arctic exploration: 1128
St Lawrence: 1131
flag: 1132
Ephraim McDowell: 1138
Oregon statehood: 1124
Soil conservation: 1133
Forest conservation: 1122

bicententary statehood 1987-1990:
PA 2337
NJ 2338
DE 2336
CT 2340
SC 2343
NH 2344
VA 2345

All of these have the minimum catalog value of 20 cents, except the mint Olympics (30 cents), C137 35 cents, C115 and C128 (25 cents).
But no one is likely to offer you as much as catalog value. My guess is that it’s about 50-50 if anyone would be willing to pay even the postage necessary to ship them.

IRRI Commemorative Stamps are Issued by Philippine Postal Corporation

Old Glory Stamped Postcards Booklet – 2003 Edition – 20 stamped post cards – 5 designs $17.38 Old Glory Stamped Postcard Booklet – 2003 Edition – 20 stamped post cards – 5 designs…

Wildlife America: A Collection of US Commemorative Stamps – Paperback – Copyright 1987 $19.99 Wildlife America: A Collection of US Commemorative Stamps – Paperback – Copyright 1987…

Birds and Flowers of the Fifty States: A Collection of United States Commemorative Stamps – Hardcover – Copyright 1982 $59.99 Birds and Flowers of the Fifty States: A Collection of United States Commemorative Stamps – Hardcover – Copyright 1982…

American Postal Collection St. Paul Ocean Liner with Stand $9.95 …

Looney Tunes USPS Commemorative Stamp Bookmark from 1997 – Tazmanian Devil $9.19 Bookmark Looney Tunes United States postal service Stamp Collection. the stamp about 2″ x 1.25″ . made in USA . they reflect the image of a uique postage stamp featuring one of the world’s most beloved animated characters….

BSA Norman Rockwell’s Boy Scouts of America $12.95 Since the beginning of the Scouting movement in America 100 years ago, events have been recorded in paintings and drawings by an official artist. Remarkably, there have been just two official artists in all that time: Norman Rockwell and Joseph Csatari. Through brushstrokes of oil paint on canvas, the artists chronicle the history of Scouting in America – from campouts, hikes, and pinewood derby r…

Wildflowers : a collection of U.S. commemorative stamps. $2.89 Large Magazine Size Oblong Hardcover with 64 pages. Full Color Photographs throughout….

Golden Moments: A Collection of United States 1984 Commemorative Olympic Issues $14.90 Oversized book of the 1984 Copmmemorative Olympic Issues…