Supratek 845 PP crazy big 14 tube stereo amp anybody?

Here is a picture of the amp .. anybody familiar with Supratek amps. I am told this is a a 40 watt pure class A push pull stereo amp .. one of a kind i guess .. any thoughts / ideas to value etc etc I have a opportunity to purchase  

Just figured I would toss it out there 

Thank you 
They were known for their excellent preamps and closed shop some years ago.  I didn't know they made ?power or integrated amps.  I bought an ASL 845 integrated SET amp myself fairly recently.  I would audition the amp to make sure you like the sound.