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

Used are used and NOS is Old stock but un used....There are plenty of good NOS tubes around..You just need to know the House sound of each type you need..Each one sounds just a bit different so you should buy from an expert tube supplier...Don't buy Ebay junk,you may be sorry if you do.......

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.........