With Best Buy's CEO stepping down yesterday there's a lot of talk about how Amazon is killing all retailers. Below is a chart comparing AMZN's revenues vs. BBY's. Also there is are chart comparing each company's gross margin and market cap. Electronics and other merchandise was roughly 60% of AMZNs sales in 2011, so it really only sells about half as much electronics merchandise as Best Buy does. It's market cap is 11x larger though.