You can get quality factory 45 Colt for $35-$38/box (50) right now (Flip ammo, Ammo Inc. brand, made in WI, I think) and buying all new components except brass, reload 45 Colt for about $21/box (50). [LPP ~$80/1000 @LGS, Powder $32/lb @ LGS, Bullets ~$50-60/500 all over)
If you want big, old...