When I was growing up, our small Wyoming town had a military surplus store creatively called “War Surplus”. Since then, I have searched out every military surplus store I could find in every place I have lived in since. One of the best in northwest Oregon is Sgt. Gators Post Exchange (I’m not making that up) in (mostly otherwise) Boring, Oregon (not making that up, either). Boring is actually quite nice, over 20 miles out of downtown Portland, yet marking the end (or beginning) of the Springwater Corridor, the path that will lead you to the middle of that city. It is a great place for views of Mt. Hood, dive bars, greasy spoons, farms, and military surplus stores.
(Apologies for parentheses, and for the poor quality photos).