I believe you get what you pay for in general, however the higher you go the less difference it makes per £ . There is however a lot of snobbery in HIFI and some companies charge 2x what other would simply because they can Linn being case and point they are decent but the engineering and sound is no better than other makes that are way cheaper, the LP12 for instance is a great turntable but ive owned a few turntables and my sme 15 / V combo blew my LP12 klimax se out of the water for much less money, however the Linn did look nicer. I guess companies will charge whatever people are willing to pay, and most of this comes down to snobby hifi dealers that push these makes that are high value and bigger markups.
I don't trust many Hifi dealers they are like car dealerships these days.