Recent thinking about an old 'thought experiment' ...
If we could create an absolutely identical copy, prefectly identical right down to the sub-atomic level, of a famous artwork, say the Mona Lisa, would it have the same value?
My initial answer to this was "no", but I struggled to answer 'why?'. Recently I formulated an answer to why: "Because Leonardo Da Vinci, in the example, never touched the copy".
Then I realised that this has some interesting implications. First, that the history is part of the value, and this is not just about antiquity. We feel some sort of connection across time back to the artist.
Secondly, it addresses why we struggle with the value of an artwork (in any genre) when we later discover that the artist has some very bad skeletons in their closet. (Not applicable to Leonardo, as far as I know). So when a popular arts-person (think Woody Allen, Rolf Harris, Mel Gibson, et al ) faces accusations, then suddenly their previously acclaimed work is usually also consigned to ignominy. It's because we somehow feel an intrinsic link between the value of the work and the person of the artist.
I may not be breaking any new ground here, but it was an "a ha!" moment for me.