I couldn't sell something like that. It would have to have a place of honor on the desk, watching over my activities.
I'd be tempted to take'em all out and roll around in them on the floor....eh'hem....did I say that out loud ...I know, I have problems...I own it.
You guys are funny... however, ever since age 6 I've wanted to build my own treasure tower like scrooge mcduck and go swimming. Then I learned about physics and it put a big damper on that plan so I switched to wanting an apartment loft just like tom hanks's in "Big." Neither came to fruition but I turn into a kid again every christmas and still dream
Since I hijacked your thread with my weirdness, let me be the one to get it back on track. The WWII skull cap is icing on the cake. I'm with @SuperDave thst thing would be one of a few centerpieces in my office. You piced up some great stuff, and the fact that it's gonna be appreciated by you is even better.
I think if you want to increase the value of the collection. Make a spreadsheet of what's in it and approximate grade