This week from March 11-17, Toys R Us United States will be offering a LEGO sale with BOGO 50% off all LEGO City, Cars and Duplo themed sets.
They also have 2 other promotions going on including a free LEGO City 4427 ATV set ($5.99 value) with $20 LEGO Board Games purchase and a free LEGO Star Wars Watch ($19.99 value) with $75 LEGO Star Wars purchase.