About New York; Moishe's Rise: From Sneakers To Moving Vans
LEAD: Six years ago this month, a 25-year-old Tel Aviv University law school dropout named Moishe Mana was living in an abandoned building in Brooklyn and selling gloves, scarves, socks and sneakers on the sidewalks of Manhattan. Next month he is moving from a Chelsea studio to a $650,000, two-bedroom condominium on the Upper East Side, surroundings that better befit a man who founded a company that grosses $12 million a year.