You know how much margin is in an ATV?
About $800 on the big boys; maybe $150 on the entry-level stuff. Remember - dealers have to BUY the machines, in order to sell them. They don't magically appear in the showroom - there is a cost line involved.
If you want to gripe about advertised pricing, call the manufacturers. "MSRP" means Manufacturer's Suggested Retail Price.
I guess - like you and I - dealers prefer to get paid for the work they do. Funny, that. If you can do better, buy some land, buy some permits, do some design work, build a building, outfit the building (electric, displays, service tools, security systems, point-of-sale systems, electronics), stock the building (inventory, staffing, major units, clothing, accessories), staff the building (front office staff, accounting staff, trained salespeople, trained managers, trained technicians, cleaning and maintenance crews), pay the bills (electric, water, sewer, security monitoring, phone/network, staff training, system updates), prep the exterior (facilities maintenance, gardening, pave the parking lot, maintain the exterior, keep the lot plowed in winter), get contracts with a manufacturer or three guaranteeing you will promote and move their product for them... and then you can figure out the best way to cover all that overhead.
A small dealership has about 50 staff members (total). Figure $20/hour average, for each one. That's $1,000/hour just in payroll. $40k a week, minimum (more like $60-80k considering the amount of hours worked). That doesn't count any of that other stuff - that's just to pay people to be in the building.
But you're right - if the dealer has the audacity to try and make a couple hundred dollars' profit...they're evil. Yup.