As one of its daily deals, Hobo Ninja offers the Men's U.S. Sarcasm Foundation T-Shirt in Grey for $9.99 plus $2.99 for shipping. That's the lowest total price we could find by a buck, although we saw it for $4 less last month. It's available in sizes S to XL. Deal ends May 28.
Note it's available in XXL for $10.98 and XXXL for $11.98.