I have researched this topic, and from the information that I am finding it appears that Best Buy is the brick and mortar retailer with the largest annual sales of electronics and televisions. I was not able to find specific figures, but they are a very reputable company and electronics is their specialty.
Nothing, because I am not a digital retailer.
Walmart is currently the world's largest retailer based on revenue and store count. It operates thousands of stores globally and offers a wide range of products, including groceries, electronics, clothing, and more.
A Pentax Digital SLR camera can be purchased at any local electronics store. Pentax Digital SLR cameras can also be purchased from online retailer such as Wal*Mart, BestBuy, and Amazon.
Best Buy is the largest electronics retailer. They also offer installation and repair services.
Sears, Roebuck and Co. was America's largest retailer in 1982
Target is the second largest world retailer.
Sears, Roebuck and Co. was America's largest retailer in 1984
Sears, Roebuck and Co. was America's largest retailer in 1981
Sears, Roebuck and Co. was America's largest retailer in 1983
Sears, Roebuck and Co. was America's largest retailer in 1988
Sears, Roebuck and Co. was America's largest retailer in 1991