May 13, 2010 --We all know that renting movies is cheaper than going out to see them. But getting a rental for free is an even better deal. Use the code GT13A to get a free overnight rental from Blockbuster Express. To find your closest location, click here. Thanks to Moms By Heart for this tip. And remember, you can get coupon codes that are updated every day to save you money by clicking on our Codes and Coupons page.