I just bought 8 AC Delco 41-101 iridium spark plugs at AutoZone and I get a $10 gift card and another form for a $2 per plug rebate!! The gift card deal is good through 8/22 and the rebate deal is good through the end of the year.
That makes the price per plug about $4.30 vs normally $7.00.
Get 'em while they're hot!