Tubes for my Mac's 275....NOS or just used?

Nsgarch: It probably wasn't a fair statement about Ebay junk..I have done many good tube deals on Ebay..My point was for a newby or Someone that might seem new to the NOS scene,I think it would be the smart thing to buy first from a relaible ( but more expensive ) tube dealer,thus having a better chance of getting exactly what he might think he is getting..I just think there is a higher percentage of satisfaction that way ..As you did mention.The best thing any potential tube guy can do is " his or her Homework " ...I know we all have put our time in and it does pay off down the road.........

I have purchased tubes before (from Andy) etc. and I do understand the meaning of NOS. However, a big thank you from me for your help.
I would like try to keep the cost down so I though going to e-bay may be good.
If I do, sightly used is OK? I would also think so...right?
Any of you have success with anyone in particular on e-bay? In other words...are there any regular tube dealers on e-bay.

P.S. Neil, I am getting there...(slowly).

Thanks Albert...in particular what should I be looking for in a used (or even NOS) tube Telefunken?

Please, all respond if you can offer advice.

Tks!

Rick (RWD)

My advice is seek out a seller that has a reputation for selling tubes with lots of positive feedback.

Be sure specifications are included in seller description such as test results and remaining life and maybe a money back guarantee offer?

Photo's should be in ad, showing general condition, markings, condition of pins and the embossed "Diamond" on the base, surrounded by the 9 pins.

Small signal genuine Telefunken tubes will have this embossed diamond. If not, it was built by another (NOS) producer and sold to Telefunken (rare but possible) or counterfeit.

Counterfeit is unlikely with the best tube sellers, these guys know the difference between tubes, some even read the manufacturer codes and include date and location of construction in the description.

I have almost zero problems with buying tubes like this, the only exception is VERY sensitive locations such as the first gain stage of a phono. This is an especially vulnerable spot as signal from this point on is magnified thousands of times by the time it reaches the speakers.