Anyone have/ordered the Job 225?

Hmm.
My 225 was an early unit which had the grounding problem.  Not to worry though. It is an easy fix. I sent my 225 to a place in NYC as instructed by Goldmund/Job. Mine was covered under warranty but since yours is used, you'll obviously have to pay the labor.This is, of course, if you have the same problem.
My 225 did it with the volume turned down though.

Thanks. More of a tube rush sound as the hum through the woofers is slight. The tube rush sort of hiss is strange? Hiss is a ground issue? I know a 60hz hum is grounding, but hiss? 

I know the unit is two years old. Perhaps the seller will pay for it. 

This is amp sounds amazing on my Harbeth 40.1 speakers! Wow. 

Devil boy, my heat sinks get so hot I cannot keep my hand on them for even a second when I crank the volume. Do you find this to be true? burning hot. 

Jesus! Sorry to say, but sounds like you have something going on there. 
I never felt the heatsinks, but I'll do it tomorrow morning.

Well, you DID also say it was a hum, so that's why I suggested grounding issue. 
I could be wrong. I'm nowhere near an expert on this.