• Lunessa is hosting a fall sale and party, offering discounted jewelry from designers like Elise Perelman, Dana Kellin, and Catherine Weitzman. Becky Kelso will also stage a trunk show. Spend $50 or more at the party and receive a gift bag. 100 Thompson St., nr. Prince St. (917-305-0510). Party: October 30 (5–9). Sale: daily (11–7).
• Be one of the first 100 people in line at the new Upper East Side Sephora store and snag a gift card. The cards will be valued at various amounts, some up to $100. 144 E. 86th St., at Lexington Ave.; Opening: Friday, 10/30 at 9 a.m. Regular hours: M–S (9–9), Su (10–7).
• Gap is previewing Stella McCartney's new collection for BabyGap and GapKids for one day, before its official release on November 2. The full collection for boys and girls, from newborn to 12 years, will be available. 680 Fifth Ave., nr. 54th St. (212-977-7023); 9 a.m.
• A.P.C. is hosting an overstock sale, offering womenswear, menswear, and accessories for up to 80 percent off. The men's cotton cowboy-cut button-down shirt is $90 (originally $153), the women's ivory cotton and silk dress is $165 (originally $275), and the chestnut-brown baby llama wool oversize scarf is $120 (originally $199). Stock will be replenished daily. Through 11/1. 33 Grand St., nr. Wythe Ave. (212-966-9885); F–Su (11–7).
• Oak launches the Skeletons in Our Closet sale this weekend at the Bond Street location. Check out the store's basement for deals on select past-season merchandise from Opening Ceremony, Acne, Grey Ant, Scout, Rachel Comey, and more. Through 11/1. 28 Bond St., nr. Bowery (212-677-1293); F–S (11–8), Su (11–7).
• Coats and jackets by Michael Kors, Miss Sixty, and more start at $69 (originally $250 to $400) at the WearMySample.com pop-up sale. Through 10/30. Arthur & Co. Boutique, 828 Lexington Ave., at 63rd St. (212-355-3469); F (11–8).
• Merchandise is up to 80 percent off at the Yves Saint Laurent friends-and-family sale. 260 Metropolitan Pavilion, 125 W. 18th St., nr. Sixth Ave., fourth fl. W–Th (8–8), F (8–2).
• Receive a complimentary L'Anza hair treatment (regularly $25) and free giveaways at Salon Ziba. By appointment only. 200 W. 57th St., nr. Seventh Ave. (212-767-0577); Th–F (noon–6:30).
• Fall/winter apparel for men, women, and kids is up to 80 percent off at the Gant sale. 20 W. 55th St., nr. Fifth Ave. (212-230-1949); Th (8:30–6:30), F (8:30–5).
• Knit dresses and tops from Robb & Hugo are up to 85 percent off. Robb & Hugo Showroom, 214 W. 39th St., nr. Seventh Ave., Ste. 907; daily, 10–6.