I, too, own a Power Plant Premier. I still remember the day I put in my system so many years ago, and discovered a new level of detail and dynamics from the lowered noise floor. This was the product that had me take notice of PS Audio! I recall sending it back to PS Audio at some point many years ago, as I found something rattling around inside when I moved it. They took care of the loose part, made sure it was up to spec, and it’s been in a secondary system ever since. The P5 I replaced it with about 5 years ago was an audible improvement, sure, and the P20 that just replaced the P5 in my main system is in another league, of course. This takes nothing away from the merits of the Premier. It’s also worth mentioning that, in the years I’ve owned it, It has successfully protected my gear through power outages and thunder storms. If you like the price you find for a used one, I’d say you’re making a reasonable decision. And PS Audio has always proven themselves to be first class in taking care of repairs on the rare occasions I’ve sent them something.