Confirm everything with your dressing bureau. BUY Mayle What: Silk dresses, $175 (were $600); cashmere sweaters, $95 (were $350); alpaca coats, $300 (were $1200); Billie bags, $180 (were $545). Why: Plus one-of-a-kind pieces up to 85 percent off. When: Thurs. & Fri., 10 a.m.-7 p.m. Where: 263 W. 38th St., b/t Seventh & Eighth Aves., 16th flr. (212-941-7210). Archetype Showroom Sample Sale What: It’s that time again: Lorick, Quail, Fremont, Samantha Pleet, 80%20, and more on the cheap. Why: Where is that tax refund, damnit? When: Thurs.-Sat., 10 a.m.-7 p.m. Where: 676 Broadway, b/t Great Jones & Bond Sts., 2nd flr. HELP In Honor of the Earth What: A whopping 100 percent of Il Buco’s prix fixe lunch proceeds benefits a project of The Alliance for Climate Protection, wecansolveit.org. Why: The resto has long supported the local, sustainable agriculture movement. When: Lunch, Thurs.-Sat., noon-4 p.m. Where: 47 Bond St., b/t Bowery & Lafayette St. (212-533-1932). Host a Wireless Electronics Drive What: Start a collection bin in your building (or office) for old cells, iPods, digital cameras, pagers (whoa, dated!), and PDAs. Why: For every device collected, Recycling for Charities will donate $1 to your charity of choice. When: How about now? Where: For more info and to donate online, go to recyclingforcharities.com. HEAR Free Filmmaker Talk Series What: Out of the cinema and into the Apple store. Listen to Clive Owen, Morgan Spurlock, Greg Mottola. Ask questions in person. Why: Next week: Harmony Korine (May 1), Paul Haggis (May 3), Matthew Modine (May 4). When: Fri.-May 4. Times vary. Where: Apple store Soho. Info and times online at apple.com. EAT A Midnight Feast What: In the name of Greek Easter, tavern Persephone offers a traditional, celebratory four-course menu. Why: It’s all Greek to you — at least this weekend. When: Sat., stroke of midnight. Where: 115 E. 60th St., b/t Lexington & Park Aves. (212-339-8363).