Shopping the sale racks (or online sales) of the retailers with the higher-quality clothing will save you money over the discount/lower-end stores every time. One, the cost will be roughly the same and two, the items will last much much longer than their inferior counterparts.
Sign up for email newsletters and sales notices with stores like Nordstrom, Bloomingdale's, L.L. Bean, H&M, Dillard's, Talbot's, J. Jill, Garnet Hill, Macy's Bon-Ton, Lands' End, Banana Republic, Gap, etc. Click through the email links for the best deals. They send out Sale notices frequently. Many offer free shipping, or free shipping with a minimum purchase. Sometimes they waive the minimum purchase. Buying from a department store that doesn't do business in your state will save you sales tax usually.
Nordstrom has two really excellent sales a year on Ladies clothing.
Nordstrom Rack also carries discounted first quality apparel. Other stores offer cash back for future purchases. Some offer a percentage off the total sale.
Many deals to be had out there!