It's rumored that Walmart will drop the price of the 3DS three days prior to Nintendo's official date.
Walmart may be dropping the price of 3DS early. According to the website Cheap Ass Gamer, they have received information from a trusted source that Walmart will be dropping the price to $169.99 on August 9th, 3 days prior to the scheduled date of August 11th.
Those that have been hesitant about buying the 3DS thus far may wish to take advantage of this offer. If you log into the eShop before 11:59 p.m. Eastern Time on August 11th, you will be made an Ambassador and will be eligible for the 20 free downloadable titles that will only be made available to early adopters.