what is the significance of dave singleman?
-shows that one of the only reasons he wanted to become a salesman is because he thought it would be easy and he would be secure into old age
-huge contrast to willy, lots of people show up to his funeral unlike willy
-who willy idolized and wanted to be, led to his downfall as he couldn't put the work in, he also didn't have the right skillset to be a salesman