Complete US Collections

And aren't almost all of those "many modern omits/imperfs/untagged" items minor numbers as well? Assuming that they even have actual numbers. They are not required for completeness any more then the inverts would be, and unlike the inverts few would even notice if they were not there.

It is interesting that it would be conspicuous by their absence for not having inverts. I guess the cachet of what a complete collection is requires hitting all the marketing expectations of completeness.

I believe it would be WAY harder, yet WAY cheaper to obtain a 20th century complete untagged collection. Inverts are auctioned all the time, and money solves those problems. I deal with a few sellers that specialize in untagged material and money isn't the bottleneck for `shaking things loose`. It's actually finding a specimen. Plenty of dealers will say, I'd def sell you one, if I can actually find one. With a 40 cat value they're not popping on auctions either. These scarcities I believe are significantly undervalued.