I want a nice kettle, £100 for well designed item that might last many years is a sum of money that is totally inconsequential to me, and I'd wager for most people on here, it's not as if I am getting a million quid kettle.
Speaking as a lifelong tightwad I have to say that I wouldn't dream of spending anything like that on a kettle. I don't think any kettle is much better than many others. Certainly not four times better. I wouldn't buy an £8 kettle. I'm not an idiot. But I'd do some homework and find out how much I have to pay to get something that will do the job properly and reliably, and look for one around that price that looks ok. I think I did something along those lines to arrive at:
Barely north of £20, and it melds classic style with modern functionality. It says so, so it must be true. (I wonder what modern functionality is? "I want this water boiled, and I want it boiled in the modern way. Not the old fashioned way. The modern way.")
Anyway, that was about four years ago, and it gets used & abused on a daily basis in a busy kitchen, and it's never missed a trick. Boiled water sir? Certainly sir! What more can you ask?
Each to his own, but £100 seems a lot for a kettle. (Not to mention
£499.95, which I have to say strikes me as obscene.)