Tubes

+1 @tvad!
I wouldnt trust ebay for such a purchase.....
I have used Brent Jessee, as well....pleasant to deal with, great advice and selection...in this case I believe you get what you pay for, with diminishing returns.....
Good luck

I bought several tubes from ebay, including a rare nos sylvania 5751 disc getter and a nos rca 7025 gray plate, both of which are installed and sound great. You pay your money and take your chances....it helps to look at the sellers feedback. These sellers both had thousands of 100% feedbacks. These tubes were installed into a Tavish Design classic phono preamp. The third tube, a 12au7, is a GE JAN military tube purchased from Kevin at Upscale Audio. This particular 12au7 is one of the quietest available, adding excellent detail, low noise and a blacker back ground.

I've bought lots of NOS ebay tubes from reputable dealers with return policies. The new stuff I get from Viva or other reputable dealers. Not a big deal. 

PSVANE 845 WE replica from a trusted Ebay user with a solid longstanding 100% feedback turned out to be mistake. Very noisy tubes probably at the end of their life. I requested a refund.