Dick's Sporting Goods cuts an extra 25% to 40% off select clearance items, already marked up to 60% off. (Discount applies in-cart; alas, not all marked items are eligible.) Shipping adds $5.99, but orders of $25 or more bag free shipping. A couple of best bets, with prices after all discounts and $5.99 for shipping:
Reebok Women's T-Back Tank Top for $5.98 ($19 off)
adidas Men's Phenom Embossed Tech 3/4-Sleeve Shirt for $14.38 ($16 off)
It's worth paying a little more for these indestructible items. You may never have to buy another again.