You're comparing JL's prices to a list of many different competitors. Of course some brands are going to price certain products differently, and products in a certain category more competitively. How about you compare them to another manufacturer? Thats like saying walmarts expensive, and then backing that up by providing comparisons of Walmart's prices to 50 different competitors. I wouldn't be amazed if some other stores sold certain products, or comparable ones cheaper as well. Doesn't mean Walmart is over priced, or that they're not cheaper on average than the competition.
Your comparison is flawed in many ways.