Tommy Hilfiger Outlet cuts an extra 40% off sitewide via coupon code "HAPPY40". Shipping adds a flat $7.95, but orders of $150 or more qualify for free shipping. A couple of best bets, with prices after coupon:
Tommy Hilfiger via eBay offers the Tommy Hilfiger Men's Classic Dress Shirt in White for $28.99 with free shipping. That's the lowest total price we could find by $29. It's available in sizes 41 to 46.
Tommy Hilfiger via eBay offers its Tommy Hilfiger Women's Short Sleeve Crew Neck Tee in four colors (Black pictured) for $11.99 with free shipping. That's the lowest total price we could find by $4. It's available in sizes in XS to XXL, although not in all size/color combinations.