Looking for suggestions for a good and trusted tube dealer

Andy is the best I've found for top quality tubes which are truly NOS. He measures every aspect of a tube including noise and microphonics. Brent is great as well but does not test for noise. There is a $10 fee for noise testing, no big deal, just remember to request it especially if purchasing 6SN7's.

Prices have increased dramatically over the past couple of years due to the dwindling supply of new old stock. As whart has mentioned, many so called NOS tubes have been pulled out of a particular device and may even have the original box. An honest dealer will list tubes as "tests as new" and provide test results.

    Another vote for Brent Jessee, for signal (octal and nine pin) tubes (excellent tube quality/testing protocols and customer support*).

     For power tubes: Upscale Audio and these guys:

https://tctubes.com/6550-KT88-KT90-KT120-tubes.aspx   (*ditto, for both)

     This eBay seller, in Germany, for the real thing in NOS, rare Siemens, Teles, etc:

https://www.ebay.com/sch/i.html?_dmd=2&iconV2Request=true&_ssn=audiotubes_de&store_cat=0&store_name=tubesandradio&_oac=1   (*ditto)

Having bought from most of the providers mentioned above, for my better NOS pairs I finally caved and bought some curve tracer matched-triode pairs from Brent Jesse. They did exceed others and were worth the added cost. 

I mostly buy my tubes from Brent Jessee.... 

I sure appreciate all the feedback!

Brent Jessee did email me back. I had described my system, the room, & my musical preferences and he replied:

"NOS tubes will be far better than the EH tubes you are running now.  I would suggest General Electric for your taste in music:

Good: 6SN7GTB 1960s GE side getter, $75.00 per matched pair

Best: 6SN7GTA 1950s GE short bottle, $119.00 per matched pair

Both are rock solid performers, the GTA has a bit more image and focus."

I still haven't called Andy yet.  I think I'll give him a call tonight or sometime tomorrow.