He gets a painting. She gets someone willing to smuggle her out of the country. 

Consider the alternative- she keeps the painting until the Nazis take it when they send her to a death camp, and the person smuggler goes on to do some other profitable work, whatever that might be. 

The third scenario where the guy smugglers her out out of the goodness of his heart doesn't exist- she didn't find that guy, if he even existed.