Walgreens has ~10-Oz Kit Kat Snack Size Halloween Candy (Various) on sale at 2 for $3.58 when you 'clip' the $1 off coupon on the product page, add a quantity of 2 (can mix or match) to your cart and apply promo code WAG10 in cart. Store pickup is free on orders of $10 or more.
Note, availability may vary by location. Must be logged in to account to use coupons. Select items may also be available for shipping to store in select locations (no $10 minimum needed).