$5 Polos at Old Navy on 4/3 + extra 30% off April 2, 2010 by iGoBOGO Old Navy is having a One Day Wonder sale tomorrow 4/3. Polo shirts for the whole family will be only $5.00. That’s a great deal! But it will be even better if you take this Old Navy coupon for 30% off 1 item with you making them $3.50!!