I gotta agree with John, Most older plumbers service trucks were about as beat up as they could get.

There would have been a pipe rack up top, ladders on the sides and a pipe threading machine on the back. They were usually greasier than most due to the soldering flux and threading oil they used that got all over everything, including the plumber. When plumbers weren't getting greasy, they were digging in the mud or rodding out sewer lines. Most plumbers chewed tobacco and they all smelled bad!

And they would easily put that mileage on a truck in a only few years.

The one listed looks sweet, though!