Tubes


Im looking to for replacement tubes for my Mastersound 845, 2 of each

Tubes in question: 6SN7 845 ECC802

I bought WE replica 845 from PSvane   

now I need 6SN7 and ECC802 

I saw new 6SN7  Tung-sol on eBay for about 50$ for pair. There are also vintage Tung-sol on eBay. Not sure how to proceed here. Is eBay a reliable source for tubes? I like their quick shipping and confidence in returns in case something is wrong.  What other sources are reliable for aforementioned tubes? 
ei001h
I've never had the PS but read somewhere they take about 48 hours to open up. I like the paypal method of being able to protect your purchase also. Maybe it is my ears but the Melz sound better after a couple of days running. You probably know more about tube construction than I do.
Cheers.
Go to Brent Jesse recording ,
vintagetube services,   For the real deal there were Millions of   tubes made ,they were much better made ,far better tighter vacuum and well worth the effort ,every brand sounds a bit different ,call Brent he will guide you in the balance you are looking for and you can get a 2 year warranty for an extra reasonable fee.

Avoid eBay. 50/50 and not worth the risk to the gear. I have bought lots of vintage tubes from several sources. Those listed above are all top notch. Add Grant Fidelity - sells the spin-off brand from psvane - should be trusted. For eBay, I’ve had luck with all the rectifiers I’ve purchased but not so for input tubes or power tubes. 
I just bought from Upscale a matched pair of Gold Brand Sylvania vintage 6SN7 (GB-6SL7WGT) for about $100 apiece for my Cary phonostage.  They are excellent, especially very quiet for the phonostage.  I’m not sure that Upscale has more of these, perhaps they could be found elsewhere.