The paw print on my railing on the porch from my cat stepping on the newly painted area is valued by me, it refreshes memories from her and makes me smile. None would pay for it, and if I repaint the porch the print will be over painted.
That does not make the print worthless while it exists
In which case the monetary value is the amount they’re willing to pay or pass up to have/retain the experience.
The paw print on my railing on the porch from my cat stepping on the newly painted area is valued by me, it refreshes memories from her and makes me smile. None would pay for it, and if I repaint the porch the print will be over painted.
That does not make the print worthless while it exists