Menard's has it below $7 every day. That's where I get mine.
Agree, so does farm and fleet/fleet farm same price 6.98 or so.
I did get a gallon jug of seafoam though at advanced auto parts a few years back with a 10 dollar off one purchase coupon, per ounce was a much better deal.
by the way, does seafoam go bad after say 4-5 years just sitting around in the basement on a shelf??