As one of its daily deals, Hobo Ninja offers this Speak Softly and Carry a Big Stick T-Shirt
in Athletic Heather for $9.99. Coupon code "IWILLSHAREHOBONINJA" cuts it to $5.99
. With $1.99
for shipping, that's the lowest total price we could find for such a shirt by $11. It's available in sizes S through XL. Deal ends October 13.
Note that size XXL is available for an extra 99 cents, and size 3XL for an additional $1.99.