Kohl's offers the Croft & Barrow Men's Signature Pique Polo
in 24 colors (Aqua pictured) for $9.99. Coupon code "MAYFLOWERS" drops it to $8.49
. With $5.95
for shipping, that's $21 off and the lowest total price we could find, although we saw it for $1 less in March. It's available in regular sizes from S to XL, as well as tall sizes L and XL, although not in all size/color combinations.
Of note, you can buy eight shirts for $79.92 before the coupon above, $67.93 after, and qualify for free shipping.