You guys have to realize that most products you buy ANYWHERE, may cost a fraction of what you pay. Jordans cost like $20 to make, but sell over $150, you think those Louis Vuitton, or Gucci bags cost $600 to make then you are crazy, try a fraction of that, then they sell for $1100+. There are hidden costs in businesses, its not just the cost of the raw materials involved in pricing, but marketing, utilities, employes, lots and lots of taxes etc...Business have to make money or what is the point of the business? I'm sure any place where you work sells a product or a service, and what does it cost them to produce it, not much, but the profit must pay your salary or you wouldn't have a job...so stop complaining.
Now I can't comment on the these places or salespeople you went as I don't know them or anything. Professionalism is a must and if they aren't professional, then that's bad on the business and not good practice. From my experience the people who usually come like a mad lunatic and acting unreasonable are the ones who are the biggest problem makers and want everything for free. I own a food business so I know all about that. We try to give the best customer service and competitive prices but honestly you can't please everyone and that's the TRUTH.
I found this site because I was going to buy my GF a straightener so I stumbled across this site. My sister has one and she uses it regularly and absolutely loves it. She had other brands like Chi, and Paul Mitchel but swears by Kor, Anyways that's just some knowledge for those that don't know.