How expensive are best NOS tubes ? And how difficult to find ?


Phono stages, preamps and power amps. Any non-Chinese adequate substitutes? I know that if you have Lamm, Vladimir has a few sets of Russian tubes in stock for each particular unit, and it is not really expensive to retube them. But if you have, say, VAC or CAT or Atma-Sphere and want best longest lasting and most reliable tubes, what then ? Don't ask me why not Chinese, I can't talk about it here except that I don't trust their quality control.
inna
I forgot to mention about a good tube dealer in my post. I too, get my tubes from Andy Bouman of VTS. This gentleman is extremely knowledgeable about tubes. Especially NOS. Yes. Different makes of tubes have specific types of sound and you should match them to your system accordingly. 
Kevin Deal at Upscale Audio
+1  I have known Kevin for over 30 years.  The dude is a tube guru.  He has never steered me wrong.
If you are interested in reasonably priced cryogenically treated tubes, contact Ron Sheldon at Cryoset.  His cryo'd new production Gold Lion tubes sound great and seem to last forever.  http://www.cryoset.com/catalog/index.php