Loro Piana's cashmere is pretty much the finest money can buy, so buy more for your money at their sample sale, where cashmere knits, outerwear, accessories, and clothes for men and women can be had for super-reduced prices. Credit cards only; no strollers or children under 12. Through 4/26; 9-6:30, 9-5 Th.; 317 W. 33rd St. (8th & 9th Aves.).