Furor surrounds Amazon’s comparison-shopping app Price Check 0 Randall Gross US NewsDecember 2011Saturday, December 10, 2011 at 8:31 am PST • Views: 1,043 latimes.com App Price Check Bar Code Big-box Retail Chains Bricks-and-mortar Shops California Latest Dispute Legislation Main Street Businesses Marketplace Fairness Act Price Check Sales Taxes State Sales Taxes Unfair Advantage