It's time again to sell some of my tube stash. Some of these tubes are among my favorite 12AT7 types but are extra sets which I will never use.
All prices include shipping and paypal.

All tubes were tested for shorts, grid leakage and emissions on either one of my two Sencore 162 testers. Min. good is 70 on the Sencore. A typical new 12AT7 tests approx. 97-102. They were also sound tested for noise, before I stored them away.

1950s Brimar 6060 (preminium) Yellow T. One of the two holy grails of the 12AT7, the other being the Genalex A2900. Nice, warm sound. Tested at 98/95 and 96/95. Price: $45 pair. If you can find them, they normally sell for over $100 pair from the various online tube vendors.
SOLD!
1960s Brimar 6060 (preminium) White T. These are not as warm sounding as the Yellow Ts, but have better detail yet still smooth. I actually prefer these over the Yellow Ts. Most of the labeling has faded. Tested at 98/98 and 98/97. Price: $40 pair.
SOLD!
Late 1960s Brimar 12AT7. Similar sounding to the White Ts, with a little less focus. I have 2 pairs for sale. Tested at 97/99 and 99/100, 99/100, 99/100. Price: $32 pair.
both pairs SOLD! 
1960s RCA 12AT7 black plates. I use the RCA black plate more often than any other 12AT7 brand, because of its warm, rich tonality with just the right amount of detail in my modified Jolida. This is a spare pair. Tested at 96/96, 96/96. Price:
$32 $30 $28 pair.
SOLD!
1960s Sylvania 12AT7WA 3 mica grey plates. These are the military versions and sound similar to the Brimar 12AT7s. They will last longer than the typical 12AT7. Tested at 95/97 and 97/97. Price:
$30 $28 $26 pair.
SOLD!
RCA 12AT7 grey plate. I have only a single of this type. For someone who wants to experiment/tube roll. Tested at 95/91. Price:
$8 $7
SOLD!