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

One more thing to consider is the tube equipment you are potentially going to buy.  tube manufactures will run the voltages at different levels depending on the use and power they are trying to get. lightly taxed tubes will last significantly longer then tubes run close to their max. Small signal tubes like preamp tubes i've seen last more then a decade. I've pulled tubes out of old military gear that have been used continuously for 50-60 years. its all on how hard they are run and the application. of course original build quality, and that area modern tubes are making great strides.Like others have mentioned.


Glen


Inna
Andy really is a cool dude and can tell stories about sourcing good stock - that itself is like a global
episode of American Pickers

it does or at least has helped me to build a relationship with a trusted source - Andy for me and start to lay wines into the cellar for drinking later to follow thru on my prior analogy - I have 4 Tube components so I have a few and importantly a path to move along...
Glen, this is certainly a good point, I am not sure how to figure it out when it comes to power amps. I would not be concerned much about phono stage and line preamps. Of course, another obvious point is how many tubes you need for a power amp. Tubes in preamp lasting for a decade if you are lucky ? That's great. In any case, I will most likely start with phono preamp, it makes sense to me.
Tom, I heard there is a Navy ship junkyard in Russian Arctic. How do tubes react to cold, by the way ? Maybe Andy knows, about the junkyard I mean, and the cold. I bet he's got an interesting line of work.
I just want to add a vote for NOS or lightly used tubes, but I can see that the benefits might not be worth the trouble and expense for many people. 
Well, real audiophiles are not many people, they go the extra mile.
But money is tight these days, anything audio I buy - I have to cut the expenses somewhere else. Still, $300 bottle of French wine once a year is something that I can do.