At Frederick's of Hollywood, get select Frederick's of Hollywood Women's Panties for $3 each. Better yet, buy nine pairs for $27 and get free shipping. That's $45 off and the lowest total price we could find. (For further comparison, we saw seven pairs for $25 over a month ago.) They're available in sizes XS to XL, although not in all size/style combinations.
Frederick's of Hollywood cuts 20% off sitewide, including sale items, with coupon code "FRED20OFF". Shipping starts at $5.95 or get free shipping on orders of $25 or more. Some exclusions may apply. Deal ends September 2. A couple best bets, with prices after coupon: