The expensive American stuff would be worth buying, I think, just to have the option to reload it later - assuming the brass isn’t launched into low-Earth orbit or outright mangled by an AK or SKS’s “enthusiastic” case ejection. A brass catcher for plinking and practice would be workable, but you can kiss that brass goodbye while shooting 3-Gun or somesuch.
Yeah. Since I reload it’s cheaper to buy once fired than new brass cased ammo. Everything is pretty available except 7.62x39 ‘cause most of what is sold is the cheaper steel but I have a closely guarded source or two.