Amazon offers the Nongshim Shin Ramyun Noodle Soup 4.2-oz. Pouch 20-Pack in Gourmet Spicy for $16. Order via Subscribe & Save to drop it to $15.20 and bag free shipping. That's about $2 below what you could expect to pay for this quantity at local stores.
Be sure to cancel your subscription once your order ships to avoid being billed for subsequent shipments.