I collect
- postally used commemorative stamps from worldwide
- mint and used stamps (no CTO) of some thematics; flowers & fruits, mathematics & puzzles, penguins, cats, beer
I can offer used Japanese stamps of 1960-2019 mainly.
I love nice covers as well, so will be glad if you send your items with special postmark or nice cancellation.
Thanks in advance!
P.S.
just for information; a part of my wantlist can be shown on Colnect website. :)
https://colnect.com/en/stamps/countries/wish_list/masako-k