Rent the Runway, the online portal that loans out designer clothing and accessories for a fraction of their retail cost, hosts its semi-annual brick-and-mortar sample sale October 1 through 6 (10 a.m. to 7 p.m. Monday through Friday and 10 a.m. to 5 p.m. Saturday; 260 Fifth Ave., nr. 29th St.; 212-725-5400). Used garments and jewelry will be sold at up to 95 percent off. In the mix: an ivory Badgley Mischka cocktail dress with copper paillette embroidery (slashed from $800 to $142) and a flirty Sachin + Babi number with a beaded bodice and raw-edge chiffon tiered skirt (reduced from $660 to $162).