discount coupon

Social networking giant Facebook decided to step up into the overcrowded coupons market by offering users in five U.S. cities coupons for everything from wine tastings to concert tickets.

Now users can purchase the special Deals coupons directly from Facebook and get discounted prices or access to limited-availability goods. Facebook will take a cut of each transaction.

"Although the market has seen huge growth and there are big players already there, it's not something that's locked down," said Ray Valdes, an Internet analyst at research firm Gartner.