I found this over at lifehacker.
Apparently if you simply change the url to the current month, it updates the coupon which you can use for virtually anything in their store.
Here is the direct link:
https://moversguide.usps.com/img/coupon/bestbuy/200804_clientarea.gif
And here is the article on Lifehacker:
Shopping: Perpetual Web Coupon Saves 10 Percent at Best Buy
Apparently if you simply change the url to the current month, it updates the coupon which you can use for virtually anything in their store.
Here is the direct link:
https://moversguide.usps.com/img/coupon/bestbuy/200804_clientarea.gif
And here is the article on Lifehacker:
Shopping: Perpetual Web Coupon Saves 10 Percent at Best Buy