In the 1990's, that was an initial investment (at Harrisburg, PA gun shows) of about $1200 (Including mags and other accessories)... Sort of like a "life assurance" policy...
It was also like a "strength-building" policy... Around 1994 I would wheel them out to the van on a cart, 2 or 3 at a time... By 1999 I would carry them out to the van two-at-a-time, one on each shoulder...
Now, at 85, I can only carry about 5 loaded 30-rnd mags...{:-(
Personally, I only refer to my ammo supply by the case...
or ... by the Shipping container-full,
or ... by the boat-full.
“Now, at 85, I can only carry about 5 loaded 30-rnd mags.”
Grandpa, if the day comes that we have to fight to keep (or restore), our freedom, you’ll still be in this fight. Take heart and read about Samuel Whittenmore, who, at age 80, killed three British Redcoats at the Battles of Lexington and Concord:
https://en.wikipedia.org/wiki/Samuel_Whittemore