The nation’s business brokers closed more business-for-sale transactions in 2010 than in 2009, according to BizBuySell.com The number of closed business-for-sale transactions in the U.S., as reported by business brokers, grew 3% in 2010, according to the recent BizBuySell.com Insight Report. “Spurred on by a strong showing in the fourth quarter, the business-for-sale market showed…