Tell me please, glass negatives are rare?

[Doktor]

Tell me please, glass negatives are rare?
What are the most valuable photos on glass negatives?
I have a lot of negatives, I want to select the best. Keep it for collection.
Help me.

[Tommy]

Hi

some Motive from Glass negative are rar. But Wehrmacht,HJ,SA,RAD Glass negative is often to see.

Cheers