L.L.Bean offers its L.L.Bean Men's Casco Bay Polo Shirt in Raven Blue for $14.99 with free shipping. That's $20 off and tied with last week's mention as the lowest total price we could find for this style. It's available in S, M, and L.
Of note, L.L.Bean also offers it in tall sizes in Flint or Raven Blue for $5 more. It's available in M or L.