Some things are not that great of saving . About $2 a case on pints and $2.50 a case on quarts saved. Usually about $4 a case on 1/2 gallons an major saving on lids by buying the sleeved unprinted lids. This is compared to local pricing not ball list price.
My key to canning supplies is off season buying. A group of us get together an order and place it direct to Newell. Our order comes right out of the Ball warehouse. Last time we as a group placed over an $8000 order. Looks like this time it might hit $12000 or more as there are a few more...