Vacuum tube suppliers

I don't normally use tube equipment in my home, but I work on that and I purchase it to restore and sell. Mainly I choose to work on vintage tube units such as Fisher 500, Scott 299 or Mac 225. I get my tubes at thrift stores, antique malls and dumpsters. Then I test them with tube tester and than sell or use them in my units I work on.
I pay in average $1...3 per preamp or amp tubes. Recently I purchased 200 radio tubes for $20 with 6CA7, 12AX, 12AU, other 12's, 6H30, EL84...mmmm.... all at flea market. At least half of them test STRONG and ready for next unit. Seen folks there pay $20...300 per single tube so one taketh another giveth.

Check out Ron Sheldon's Cryoset site.  I have never had a bad experience with Cryoset.  Their tubes sound great and last a l o n g time!

I have had good success buying vintage USA and European tubes from private sellers on EBAY.

While I'm sure the recommendations here are all fine, I can't say enough good things about Andy at Vintage Tube Services.  If you are going for vintage tubes, he is meticulous about testing them and a fountain of knowledge when it comes to getting you the sound you're looking for from your particular equipment.  I have used him for many, many years and have always been happy in my dealings with him.

Very helpful discussion. I am new to tubes considering a tube pre.