should I consider older diesel pusher?

I feel the price is too high. For what they are asking you can find a newer motorhome. Granted the motorhome you are looking at is very unique in that it has bunkbeds which may not have been original but added by a previous owner. I looked at American Coach's website and they only had brochures back to 1999. They did not show a bunkbed option.

If you have to have the bunks then make them an offer. But look at all the dealership offerings to get an idea of prices here in the Northwest.

Good luck.