I know many say this is overpriced and I agree. However, you are not the target market. The target market is making at least $5K a week probably more like $10K and much more. They are paying this price because they don't have the time nor desire to spend time building the computer. Especially since it may take them a couple days to get it working if they are not knowledgeable.
These are the same type people that spend $5K on a restored 1920's Gas Pump to go with their $500K classic car collection. They fly everywhere first class.
You can also say a plumber is overpriced or car restorer. Since you can buy the parts and do it yourself for much less. Personally I repair everything in my house myself be it automobile, furnace, roof, vacuum or whatever.