Amazon, the online shopping juggernaut, just announced that it will ‘incentivize’ shoppers in physical retail stores to buy products on the instead by shaving an additional five percent off of qualifying products. The company urged customers to download their updated Price Check app so they could price check items as they stroll down the store aisles this coming Saturday, December 10:

Customers that use Price Check by Amazon (available on iPhone or Android) on December 10th to price check while shopping in physical retail stores will get an additional discount of 5% (up to $5) off Amazon’s price on up to three qualifying products in the eligible categories, including electronics, toys, music, sporting goods and DVDs.

This is the first time ever that Amazon will be giving shoppers an added incentive while in a physical retail store. It’s also the first time that Amazon has directly gone after brick and mortar retailers who have much higher overhead costs and must additionally charge sales tax in more places. So if you thought about buying the Steve Jobs hard cover at your local book shop, you may wanna order it on the shopping site instead. Speaking of which, Walter Isaacson’s Steve Jobs biography is now a best-selling book on Amazon.