I’ve got 250-300 new Peterson large rifle 243 brass, never been fired. It was from a bulk 500rd box. I’ll keep 200 if you want the rest or whatever, don’t care. $0.90 a round and I’ll pay the freight.
I have a butt-load of 3x Federal brass. It's dirty and I can't guarantee that all primer pockets are still tight, but it would meet the bar for "cheap plinking brass".