“Longs Peak from Bear Lake in Autumn” Many photographers who like shooting landscapes dream of selling prints someday. If that includes you, then you face a challenge: identifying which images will sell. It’s not as easy as it sounds. I often wrap up my longer landscape photography workshops by playing a game with students that I call “Flops Versus Bestsellers.” I show the students 16 images. Eight were bestsellers, with more than 100 prints sold. Eight bombed, with less than 10 prints sold. The students’ task is to analyze each image and decide if it soared or cratered. The game seems trivial; surely, it will be obvious whether an image was a bestseller or a dud. It turns out that the...