Right now on NFLShop.com you can save 25% off everything! PLUS when you can get an extra 30% off sale priced merchandise when you enter the code MDN30 at checkout.
You can also get free shipping on a $39+ order with the code SHIP39 but this code will not stack with the 30% off promo code listed above so you have to pick.
Otherwise, shipping is a flat-rate of $4.99.