1SaleADay.com's Ben Federman and the Value of a Daily StealThis 28-year-old Brooklynite built a successful business around the concept of loss leaders. Part of our annual Young Millionaires report.

There are times when Ben Federman loses six figures on his website's deals. And he's OK with that. The 28-year-old is founder of Brooklyn, N.Y.-based1SaleADay.com, which offers one deeply discounted item every 24 hours.

Federman typically purchases electronics, jewelry, watches and other goods in large lots--or, preferably, in their entirety--and is thus able to negotiate the best possible price with the seller, which allows him to offer the items at as much as 90 percent off the suggested retail value and still turn a profit.