I'm sure its a darned nice guitar to play but isn't the price tag of £10,000 more to do with novelty more than anything else?
For example lets take a PRS 513. I'm not sure of the top of my head how much it is but wouldn't the difference really come from the PRS novelty?
Just simply NO!
PRS are without a doubt some of the best made, with most care/attention production guitars out there. Some have more of a niche following (say Swamp Ash Special and 513) but NONE are novelty's, thats Hello Kitty you are thinking of.
the 10,000 price tag (which is'nt right imo (although am in Texas right now and not back in UK, although that does sound high even with the NASTY way some stuff is hiked in UK) is more to do with it being ONE off, Handmade, Custom, TOP materials for everything and (have to say it) collectability.