What is judge to be valuable Art?

I believe valuable art must come from a valuable artist. He must have two factors: hard work and reflections.

Valuable Art must have the element of hard work whereby the artist makes use of his talent to paint/scuplt/etc. He must have had a deep thinking process for this work on how it is going to be like. For instance, Ron Mueck. He goes through the tedious process of scuplting all those hyper-realistic scupltures, like the Pregnant Woman. He has gone through multiple prototypes, sketches and research before he starts on his work. Also, Mueck has an amazing talent. All this is worth paying for, or even more. Or like Chuck Close. Before his accident, his works were exactly like photos or even better. So realistic. It captures even minute detail of the photo and places it on canvas all by hand, all by himself. Even up till to day, despite his accident, he still paints amazingly. That is valuable art. It must be worth it. All on the artist. The artist should have gone through hardwork, mentally and physically to achieve that piece of masterwork. From there, he will earn the respect of the audience and critics and thus becoming a valuable artist.

Moreover, the meaning is very crucial. Aesthetically, it may not be beautiful. However, when one talks about it, it becomes beautiful. It becomes a beautiful piece of work. Because the meaning within it hold so much. The working transform into a mere commodity into Art. Artwork, I believe, must always hold a meaning. Behind the canvas, is a secret world where it's meaning is revealed. It becomes more than a painting or scuplture, it becomes Art. It becomes valuable Art.