There's a few places to check out when it comes to shopping for the best PC gaming deals, many of which are pretty obvious. Of course, marketplaces like Amazon and Walmart will offer a great selection but the prices or availability of some products may be slim.
More PC tech focused stores such as TigerDirect and Newegg will offer a more refined selection of deals. These guys will offer some of the best selections of hardware, as well.
Brand sites, such as Razer.com, will also offer discounts through their shop alongside retailers, too. The deals you'll find will vary greatly in price compared to retailer sites, so be sure to shop around through all options to find the best price.