Macy's offers the American Rag Men's Heaton Plaid Shirt in Basic Navy or Dark Scarlet for $12.93. Pad your order with a beauty item (they start at $3) to bag free shipping; otherwise, shipping adds $10.95. That's $32 off list and the lowest price we could find. It's available in size S to XXL.

Update: The offer of free shipping with a beauty item has now expired, but you can still opt for in-store pickup (where available) to get this deal.