I know it seems kind of crazy for this thing to cost as much as a nice computer, but you have to understand: the guy was killing himself building these things for people. When he first started doing this, I argued with him for so long about raising his prices. He was getting super depressed about working on these typewriters all the time. He thought raising the price was selfish. He just couldn't see that he needed to do it just to protect himself.
He sells the kits at a much more reasonable price. But if you want him to build you one, you definitely pay a premium.