Jim,

It is easy to minimize the value of some features such as those you listed. I can't imagine that an air dump valve is going to make or break a deal, but collectively a lot of the features you listed make the use of the coach more pleasant.

A hose reel seems ridiculous until you have hefted the kind you wind up in the mud in the rain, and then have to throw that mud spattered 50 pound bundle of wire into a nice clean bay.

A joey bed seems silly until you have crawled into the middle of your bay to try to get an air hose or some other rarely used device.

What I am suggesting, especially on a used coach where you actually pay little or nothing for these features these all tend to tip the scales in favor of the coach that has them.