This deal has ended.
Overstock has a rare deal on Under Armour: this men's Under Armour Performance T-Shirt in grey is only $19.99 (it retails for $35) but this 10% off coupon (expires 11/28) drops it to $17.99. Plus, shipping is currently free (it is normally $2.95) and there is no sales tax. Both medium and large are available. Don't expect the inventory to last long!