Hands up if any of you have spent more than a months wages (in total) to put each of your bikes together?
At the time, I spent about 50% of a months salary putting together my P7 (about £600). 2010 frame with (used) xt cranks, slx gearing and fox floats. It does what I asked of it and didn’t break the bank.
my point is (as echoed by others): if people are willing to pay for a fully built up bike from a shop, be prepared to pay through the nose for it. A £6k+ bike is not intrinsically worth that much but there are gear freaks who love having the newest, most expensivest, shinyest thing they can get hold of and this is why we see these monstrosities plagueing our magazines and webpages.