This is normal in a free market economy. For example I'd add over a thousand bucks if I had to support the end user. No offense but do you think the market should be brought under some central control?
I tried looking into this, but when I search for a GPU such as the Radeon HD 7970 different brands pop up that manufacture the same card. ex. Asus, Gigabyte, Diamond. The only problem I'm having is that each card is varying in price by almost $200. Why is each card priced so much differently when they all include Radeon HD 7970 with 3GB GDDR5?