collectibleslive.com

Below are some live auctions of Military Postcards. You will find Army, Navy, Marines and other military postcards:

Military postcard A. Guillez victim of the war (p101)
US $7.99
[...]

Below are some auctions of National Parks postcards:

POSTCARD SWIMMING POOL HOT SPRINGS NATIONAL PARK ARK
US $4.95
Auction Ends: Sunday Sep-05-2010 5:49:52 PDT
[...]