In the Merriam-Webster dictionary definition of the word ‘Value’ is the word ‘Worth’:
The monetary worth of something
Relative worth, utility, or importance
If someone says something is valuable, you can assume it’s worth is high, but the word value has changed from a form or worth, to a marketing brand, and a term more associated with discount.
That’s a great value, tends to mean it was on sale, or a discount was given. ‘Great Value’ is now a brand name for discount groceries and home goods.
What does ‘Value’ mean? I guess whatever it’s ‘Worth’ to you.