No need to RTFM! You got exactly the bottom line I'm trying get across. My "exploration" has produced reams of rambling drafts, leaving me more on the theoretical side.

The Ludwig von Mises quote is perfect!

According to Investopedia, an economic theory of his was: “the value of an object is not fixed… but is variable according to its context and the perspective of its users.” This seems to reflect what you quoted.

Price is the outcome of this valuation. Truth units are an account of this valuation in “ledger” (itemized) form. So if you read the account, you could predict the price (within some margin of error). That's a key piece of truth units theory.