Saks 5th Ave. Is Said to Be Up for Sale
Saks Fifth Avenue, one of New York's oldest and most esteemed names in retailing, is on selling block; majority owner Investcorp International, Bahrain-based investment bank, has richly profited from investing in other luxury retailers like Tiffany and Gucci and selling them; company has been seeking similar way to profit from Saks; Saks could be priced at between $2 billion and $2.5 billion (M)