Basically every conflict you have weapons that gain fame/notoriety, and that people want even decades later.
This time though, man, it's all drones. Malyuk is probably the only small arm that's going to have collectible value / interest.
Barring the funky things Ukrainians have done to Dushkas and such, but that's not really civilian collector friendly.
Absolutely no one is going to want a zigger suicide AK.