I bought a set of Autolite Iridium plugs for first fire in my reman engine next week. The price at Auto Zone is $5.99 each. However, Autolite has a promotion for a rebate of $2.50 a plug. OK, so the plugs cost me $3.49 each. Cool
But, with the Auto Zone receipt there was a store promotion (good thru 3/6/17) for a $4 rebate per plug.
Bottom line, I just got 8 top grade plugs not only free but I made $0.15 each. The deal works because you don't have to mail in the upc's to Auto Zone, only to Autolite.
John C