The Stradivarius and Rembrandt

A man bought at an auction for what he thought a reasonable price for both a Stradivarius and a Rembrandt . He was very happy with them, since the price he paid was so low, for objects made by very famous people. He decided to go to an appraiser and have them officially valued. The appraiser said: "Well sir, indeed it's a Stradivarius and a Rembrandt, but it's only a pity that Stradivarius couldn't paint and Rembrandt couldn't build violins."