Eastbay offers the New Era Men's NFL Knit Beanie in nearly 100 styles for $9.99 with free shipping. That's a savings of up to $15. Most teams are included in this promotion, although the New England Patriots and Atlanta Falcons are notably absent.
Walmart offers the Hanes Women's Long Sleeve V-Neck T-Shirt in six colors (White pictured) for $3.50. Choose in-store pickup to dodge the $5.97 shipping fee. That's the lowest price we could find by a buck. They come in sizes S to XXL, although not in all size/color combinations.