“Costco is our No. 1 outlet for Yo-Yo Ma,” said Larry Germack, Sony’s director of sales. Bigger than Tower Records? A nod. Amazon.com? Another nod. Ma sells about 20,000 units a year, at $11.99 apiece retail. Who sells more? “Ricky Martin sells about 60,000,” said Costco’s Bost. “But how many years will he last?” – San Jose Mercury-News