You get what you pay for. In this, the price point is about right. Straight up retail prices are one thing, a fully furnished, oc'd pc with all the little details like led, really nice wiring job, plug n play extreme gamer is another. Considering the amount of cpus you gave to have on hand to get a stable 5.0GHz OC on a 7700k and not get smacked with a high voltage lemon, somebody had to take the time to actually OC that beast and run all the stability/longetivity testing, swap out dud cpus, wire it patiently, etc etc etc, sure there are some builders who can do all that themselves, but it's a guaranteed fact that the majority of ppl asking questions here cannot.
I personally could build and furbish that pc much cheaper, just retail pricing, but if I put that kind of work into a $2000 pc, I'd be charging roughly the same, that's not a 30 minute slapper together pc.
This would make a perfect Graduation present from parents vrs buying all the parts separately and praying their kid doesn't blow up the pc or buy parts that make no sense.