Many low mileage M2's are available for a reasonable price, but new prices seem excessive. I have a Class 5 truck for my heavy truck camper because I also tow a heavy trailer behind it resulting in a 3.5 ton payload. I considered the M2, but it sat too high to top it off with a truck camper.
The suspension on these is harsh unless loaded down or you have air-ride. I would not consider one without using an air cushioned hitch or suspension.