Where do you guys buy tubes?

Hi, anyone familiar with 6N1 and 6P15 tubes? I bought an  inexpensive hybrid amp for a small system and would like to try different tubes. Being a tube preamp stage only, I'm not expecting alot of change, but thought I'd ask.

If you're familiar with these tubes I'd appreciate your input. I'm emailing some of the guys already mentioned in the post, fwiw.

Thanks in advance 

That ebay error has done 10,000 transaction and has a 100% rating. That's impeccable!

http://www.audiotubes.com/

and all of the above

had decent luck on ebay too but only buy from tried and "tursted" :) tube sellers.

I only buy from tired and trussed tube sellers.

Upscale Audio has been my first choice for many years. Kevin and his staff have always provided outstanding customer service.