Nordstrom takes up to 60% off selection of Burberry men's, women's, and kids' items, with prices starting at $33.75. Plus, all orders receive free shipping. Note that size/color availability for many items is limited. Some best bets:
Hanes via eBay offers its Hanes Men's Ultimate Cotton Crewneck Sweatshirt in a variety of colors (Black pictured) for $12.99 with free shipping. That's the lowest total price we could find by $3. It's available in sizes S to 3XL, although not in all size/color combinations.