There is a limit to what one should try to achieve as a profit. The words fair and honest come to mind. When you take your car to Jiffy Lube should they lie about what your car needs and try to rip you off for every dollar they can in the name of free enterprise?
Should an insurance company raise rate as much as possible to better their bottom line. If you choose to work with the public then you need to treat people fairly not try rip off every elderly couple that walks through the door. I know the free market will take care of most of the thieves but occasionally in is quite irritating. If you do not want to take an RV in on trade then say so. Don't offend the customer with a crazy low ball offer and then try to convince them that is all it is worth. I know you can walk away but still annoying!