Amazon Prime Big Deal Days is nearly live, and as usual multiple retailers have introduced their own Prime Day-like sales to compete with Amazon. In this article we're tracking a few sitewide sales from Sony, Walmart, and Best Buy with big discounts on monitors, TVs, headphones, and more. Best Buy Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running.