I have to say they do have a great website for scoping out a general price or for comparing same product such as die locking nuts from several manufactures. If I want to know the features and relative price (not best price) between say RCBS, Hornady, and Lee for a specific item MidwayUSA is one of the easier sites to find stuff and look through.
I may be able to find a better price elsewhere but I can narrow down which is more expensive and what people think of those features at that price using the Midway site.