I can tell you the average Joe H-D salesperson around here makes well below 50-60 thousand a year (SE MN). More like less than 30,000...if you're lucky. Working as a parts guy and as a service writer back in the day, almost ten years ago, we're talking more like $10.00 hr. Just like any sales job I've had the pros are, you get to meet lots of great people, help them spend their money, and watch them customize their bikes into some pretty great creations. When you work at an H-D shop, you almost become friends and aquainted with people for what seems to be life. They tell you stories about themselves, and also you to them.
Anyway, I wouldn't go into it for the money. Selling bikes is hard, but selling people parts or service is easy; as even those who buy used from Joe Schmoe still need those two things...and if you work at a commission place, selling $3,000 worth of major parts or service is a piece of cake. You'll also be well dressed in H-D gear, have tons more parts cheap, etc.
Those are my two cents on the topic.