Schiit Saga which tubes to order?

In my Line Magnetic 508, Amperex(Bugle Boy) blew up Tungsol( American made NOS) with more refined sound all around.

https://www.ebay.com/itm/PAIR-OF-6SN7GTB-AMPEREX-TUBES-NEW-6SN7-NOS-NIB-Vacuum-Tubes-Bugle-Boy/26392...

I should clarify.. a Russian 6N8S (NOS) is the stock tube for $349.00. The Tung-Sol 6SN7 is available at $374.00 and both the Tung-Sol 6SN7 and the LISST is available for $414.00.

First question; who is selling these tubes and quoting the prices? Only buy from reputable dealers.

So, I assume you are looking to buy NOS tubes rather than new production. There are so many brands and variations. There are different variants of Tung-Sol, you need to know which version you are buying. One TS oval plate will cost over $300, it's a rare tube from the 1940s and one of the greatest tubes of all time. There are also NOS TS tubes for $50 each.

http://www.schiit.com/about/news/octal-lisst-new-tube-options
Why buy a LISST tube? Then your preamp would be all solid state.

With regard to Amperex Bugle Boys, they are one of the most counterfeited tubes. They’re found on Ebay.

I'm not saying yours were fakes, but don't trust Ebay.