Old Navy cuts up to 60% off during its Stock-Up Sale. That's among the best sales we've seen from this merchant since March. (We saw a sitewide coupon for 35% off last week, since expired.) Shipping adds $7, or spend $50 or more to qualify for free shipping. Sales tax is added where applicable. After the discount, women's tanks start at $3.97, girls' T-shirts start at $3.97, boys' shorts start at $7 and men's sweatshirts start at $15. Sale ends August 4.