I'll bite. Suppose an imaginary private buyer was willing to buy the Crown Jewels for £5 billion. It's absurd to believe that the Royal Family would even ente

I'll bite. Suppose an imaginary private buyer was willing to buy the Crown Jewels for £5 billion. It's absurd to believe that the Royal Family would even entertain such an offer because (a) it's not like they would be incentivised by the money and (b) it would be a remarkable act of self-harm to the extent the deal would be so shockingly unpopular that it would only serve to threaten the Royal Family itself. So why on Earth would they agree to that? Responding "OK, how about £10 billion?" does nothing to resolve that calculus. In that sense, no price exists for which they could be sold - they are literally priceless. The idea they "are worth between 3 and 5 billion pounds" is so daft that I'm pretty sure you just got that from ChatGPT. Actually for fun i just asked: I got a material valuation of the stones at "several billion pounds if assessed purely by their material worth" (so about the same as your claim), but that "their true worth is incalculable". What's another word for a price that's incalculable?