NRG PA1 preamp. Anyone heard about it?

I came across a NRG Preamp at a shop today. I have never heard of this brand before but the owner told me this amp used to cost over $7k new and it was perhaps one of the best preamp he has heard.

I tested it (along with other components) but the sound was pretty bad. I can't make out if that was the preamp's fault or that of other components in the system.

Has anyone heard of this preamp before?
they were made in of the best ss ever, but the company went away as fast as they came into being.
Jaybo, in your opinion, is it worth a punt for a amp that is unlikely to have spare parts since the company is gone?
ifits been cared for, and the condition is cherry....oh yeah...