Name says it all - I just recently gained interest about collecting military items, especially gas masks/etcetera (after I realized parents wouldn’t mind cool militaria, been hiding that interest for a long time).

I currently have (20kg more hopefully arriving from Germany this week - I live in Finland cool militaria):

Finnish M61, 3rd generation (a group leader model). My very first gas mask, found from a local flea market.
Includes bag + filter + accessories, all in a good condition (as far as I know).

East German/Russian GP-5, in stylish black colour. Bought this from Berlin, as a souvenir.
Bag is in a acceptable condition (several buttons fell out after I got home (which means ~1 week) but is otherwise clean), but the mask + filter seem to be in a good condition.

Norwegian issue/Avon FM12 gas mask. Bought this one on my trip to Norway (spotted a local military store, went inside - and asked if they sell these. 10 minutes later I walked out carrying this one).
Includes a bag + filter + accessories.