Target offers the Airheads Bar Variety 60-Pack for $7.19. Choose in-store pickup to dodge the $4 shipping fee. Outside of the mention below, that's the lowest price we could find by a buck. It includes an assortment of orange, blue raspberry, cherry, watermelon, grape and white mystery bars.
A close price: Amazon offers it for $7.58 with free shipping when you order via Subscribe & Save.