No artist’s work is worth it’s proper value while he is alive. The moment he dies, his pictures, if they are good, reach double their former value… Do not, therefore, in general, unless you see it to be necessary for it’s preservation, buy a picture of a dead artist. If you fear that it may be exposed to contempt, buy it; it’s price will then probably not be high; But if you did not buy it when he was alive, never buy it after he is dead. You are doing no good to him and you are doing some shame to yourself. Look around you for pictures that you like, and in buying you can help some genius yet unperished- that is the best atonement you can make… giving to the living and struggling painter wages and is doing him some good.
John Ruskin, 1835