I work for the Post Office and we use to get 25% off of the older unlimited data/text plans including Nations 450 plus 200 bonus minutes. Can't remember that price though.
I've moved on to And More Premium unlimited everything now and pay $186 out the door for four iPhone lines and one Cellular watch, ATT WatchTV (35 streaming channels) and HBO Max are included free!
A big perk is that we get 50% most accessories except Apple. (Same as AT&T employees)
However, on the iPhone 13 launch Friday, the 50% off discount did work on the Apple cases, so I ordered one each leather, silicon and the clear case for $25 each.
They set a max per month on the web orders, to deter selling the stuff for a profit I guess. You can still get the discount in-store though.