You are acquiring these US caps at a good time. Plenty to choose from in very good condition and inexpensive prices. Reminds me of the late 60s and 70s with German and Japanese stuff. I miss $30.00 German helmets and $100.00 signed koto Japanese Samurai swords struggling with Hawley's Japanese Sword books to try to translate ancient Japanese kanji.
I am happy with what I have acquired through the years. Nothing spectacular. But
I have let some really good items slip through my hands though. $hit happens.