Vacuum Tube Retailer Option

Check out U.S. Tube Audio to buy your tubes in Scottsdale, AZ. Some of my 'phile friends are tube buff's and have had very good service from them during the past ten years. Been in business for 41 years.

Andy at Vintage
his testing gear top notch
really knows his stuff
fair prices
prompt shipping
excellent packing

I have had no issues with the the tubestore. Great service and tubes all stand up well. Shipping prompt. 

I have found from others Cryoset has excellent matched Cryoed tubes 
and for matched quads of 300B Tubes the current Golden Lions are excellent
value, and beat tubes double the cost and these last . I have bought vintage for tubes for years . For $560 a match quad is a great deal .vintage 
$3-4K no thanks.  for small tubes once in a while I will buy vintage. But the current Golden Lion 6sn7 , and12ax7  are solid ,dependable and reasonably priced the Cryo treatment not only adds to the tolerances,which adds fidelity ,
ss well as longevity. One addition Buy Stabilant,or Stabilant-22  after cleaning with high purity Alcohol. He Stabilant is is by NASA and about 50 other major companies . It is great signal enhancer truly makes any vacuum tubes sound better but all connections and proven to last over 12 years if left on.

+2 for TCTubes.  They have a tremendous testing set up, are thorough about it, and honest.  They seem to know the value of the NOS/Vintage tubes they have, but you can count on it when you buy it.