For Prime members only, Amazon offers the Annie's Shells and White Cheddar 6-oz. Box 12-Pack in Shells & White Cheddar for $9.29 with free shipping via the directions below. That's tied with our November mention and $3 under what you'd pay for this quantity at a local store. To get this deal:
  1. View the Annie's Shells & White Cheddar 6-oz. Box 12-Pack for $11.88
  2. clip the $2 $3 off coupon on the product page
  3. check out via Subscribe & Save for a final price of $9.29
Be sure to cancel Subscribe & Save after your order arrives to avoid being billed for subsequent shipments.

Update: It now includes a $3 off coupon, which drops the price to $8.29.