when I first started reloading 1965 you buy brass in 20rd box just like factory ammo had. I still have some of the old yellow boxes and some of the white boxes of win brass and red box Federal brass,Brown box for Norma brass, the Rem green/orange box and the Rem solid red box. About the oldest bullets boxed I have still with a price tag is Sierra 6mm 100gr @ $5.35 and a box of Nosler solid base 130gr for the 270 @ $8.50
One reason I started reloading was you could buy 5 boxes brass,box of bullets,100 primers,lb of powder and set of dies for the same cost as buying 5 boxes of factory ammo and you get better ammo. If you wanted to load Partition cost be more. It wasn't too many years ago you could buy Rem bulk bullets for less than $10 per 100 and I shot alot of elk with the 30 cal 165/180gr bullet. I also shot a ton of Rem 17cal 25gr bullets in acouple of my varmit rifles.
I think the last 10yr bullets have really started to improve and it's fun trying to keep up with everything.