What is the average dealer mark up?

Retailers paying the manufacturer 60% of list price is the industry standard. 

That is a sizable profit margin all things considered.

Actually, all things considered, it’s not. There’s a reason they’re disappearing, and it’s not because they’re raking in the profits.

What you have to look at is the monthly profit and loss statement. Cost of rent. Federal, state and local taxes. Inventory on hand, Employee expenses, medical and general insurance, electrical bills. Office supplies even mundane expenses like trash disposal. Lot's of costs involved in running a business. That percent isn't 100% profit that you put in your pocket.