If this is a SHTF buy, then look into poly's.
From what I see, the $80-$100 for AL 80's is the going price. The market is the way it is because people are getting more nervous about various things, and most know that COTUS 2A is the only saving grace there is currently. Once the commies disarm everyone, then it's really over. I suspect though, SHTF will happen way before disarming people. The commies will just basically do EO's and then take away stuff as they stumble upon it, either via watching at gun ranges, via Red Flag reports of any kind, purchase records, etc. They'll also make buying ammo nearly impossible for most by making it way to expensive and/or simply limiting how much you can buy. Gun powders will soon be a "4473" item.
Buying packs of 80's? I am not sure I see too much value in that currently if you can't get the rest of the parts to go with. Definitely a sellers market now. Obvious signs production cannot keep up. But maybe in 6mo an 80 today will be worth 1.5x as much, possibly 50x as much if a non-firearm thing becomes an illegal object, etc.