The key to acquiring a new fall wardrobe? Never, ever, pay retail. Heres a dozen chances. (Keep it clean, ladies.) What: Sigerson Morrison When: Nov. 16-20; Wed.-Fri., 9 a.m.-7 p.m.; Sat. & Sun., 10 a.m.-6 p.m. Where: 180 Lafayette Street, between Broome and Grand Streets. Why: Their first warehouse sale. Leather motorcycle boots, were $800, now $100; pumps, were $390, now $60; metallic sandals, were $350, now $60; tote bags, were $775, now $85. What: Twinkle When: Nov. 17-19; Thurs., 4-9 p.m.; Fri., 3-9 p.m.; Sat., noon-5 p.m. Where: 401 Washington Street, at Laight Street, suite 4C. Why: Cashmere sweaters, were $288, now $55; wool coats, were $500, now $150; skirts, were $360, now $110; jewelry, was $126, now $20. What: Steven Alan When: Nov. 17-19; Thurs. & Fri., 8:30 a.m.-8 p.m.; Sat., noon-7 p.m. Where: 87 Franklin Street, between Broadway and Church Street, ground floor (212-219-3305). Why: Trovata, Wrangler47, Prudence, Gauge, and others, 30-75 percent off retail. What: Dolce & Gabbana and D & G When: Nov. 19-20; Sat., 10 a.m.-6 p.m.; Sun. 11 a.m.-5 p.m. Where: 85 Spring Street, between Broadway and Crosby Street, second floor. Why: Up to 80 percent off clothing and accessories for men, women, and kids. What: Carolina HerreraWhen: Nov. 20-22; Sun., 1-6:30 p.m.; Mon. & Tues., 9 a.m.-6:30 p.m. Where: Metropolitan Pavilion, 123 West 18th Street, between Sixth and Seventh Avenues, fourth floor. Why: Couture on the cheap(er). Flounce skirts, were $1,390, now $417; wool jackets, were $2,590, now $777; dresses, were $3,790, now $1,137; gowns, were $4,690, now $1,407. What: Chaiken When: Nov. 16-18; Wed., 10 a.m.-7 p.m.; Thurs., 10 a.m.-8 p.m.; Fri., 9 a.m.-noon Where: Metropolitan Pavilion, 123 West 18th Street, between Sixth and Seventh Avenues, fourth floor (212-334-3501). Why: Dresses, were $398, now $158; jackets, were $348, now $178; knits, were $248, now $128; pants, were $230, now $122. What: Yigal Azrouel When: Nov. 15-17; Tues. & Wed., 9 a.m.-7 p.m.; Thurs., 9 a.m.-5 p.m. Where: 225 West 39th Street, between Seventh and Eighth Avenues, seventh floor (212-302-1194). Why: Cocktail dresses, were $700, now $125; cashmere sweater sets, were $600, now $100; blouses, were $600, now $90. What: Lutz & Patmos When: Nov. 15-18; Tues.-Fri., 11:30 a.m.-7:30 p.m. Where: 425 West 13th Street, between Ninth Avenue and Washington Street, suite 406 (212-463-9110). Why: Retails at Barneys and Jeffrey; now on sale. Each day the discounts get better, 50-70 percent off. What: Central Park West Cashmere When: Nov. 16-18; Wed.-Thurs., 9 a.m.-6 p.m.; Fri., 9 a.m.-3 p.m. Where: 234 West 39th Street, between Seventh and Eighth Avenues, fifth floor (212-840-5041). Why: Cashmere sweaters, shrugs, and cardigans, 40-50 percent off wholesale. What: Tracy Reese and Plenty by Tracy Reese When: Nov. 16-18; Wed.-Fri., 10 a.m.-6 p.m. Where: 275 West 39th Street, between Seventh and Eighth Avenues, eleventh floor (212-719-1010). Why: Silk sweaters, were $216, now $98; embroidered tunics, were $171, now $78; dresses, were $259, now $118. What: Philippe Adec When: Nov. 17-19; Thurs. & Fri., 9 a.m.-7 p.m.; Sat., 11 a.m.-5 p.m. Where: 213 West 35th Street, seventh floor, between Seventh and Eighth Avenues (212-391-8070). Why: Sixty percent off womens modern sportswear collection, including jackets, jeans, knits, and shirts. What: Edun and Loomstate When: Nov. 17-20; Thurs.-Sat., 10 a.m.-7 p.m. Where: 89 Franklin Street, second floor, between Church Street and Broadway. Why: Its their first sample sale. This years merch is priced at wholesale and below.