Grev,
that is the crux with this period. It was quite peaceful and lasted a long time. Almost all types of armor were made during these decades. From "modern" tosei-gusoku up to "old fashioned" armor, like o-yoroi, haramaki, do-maru (wistful remembering the glorious old times, kinda historicism, if you like....) That also applies to the qualities. You will find simple and cheap ashigaru grade armor next to priceless Daimyo sets. The whole bandwidth of blacksmithing, lacquer art, etc....etc....
Nowadays, the vast majority of items on the market are dating back to this period!