For Prime members only, Amazon offers the Doritos Nacho Cheese 1-oz. Chips 50-Pack for $12.08 with free shipping. (Sam's Club charges pennies more for members via store pickup.) That's the lowest shipped price we could find by $3.

Also available to Prime members is the Lays Classic 1-oz. Chips 50-Pack for $12.08 with free shipping via Subscribe & Save. (Sam's Club charges pennies more for members with pickup.) That's the lowest total price we could find by $6, although we saw it for $3 less in July.