Amazon offers its Prime members the NFL Men's Inside Line III Crew Vintage T-Shirt in 28 team colors (New York Giants pictured) for $9.80 with free shipping. (Not a Prime member? Orders over $35 qualify for free shipping; otherwise it costs $5.58.) That's the lowest total price we could find by $18. It's available in sizes S to XXL, although not in every size/color combination.