Help with tube tester

I have a chance to buy a bunch of electronic equipment from an out of business electronic store. I would do so because it includes tubes and some tube testers. It also includes some old recievers, preamps etc. He wnats to sell the stuff all as one lot. I am new to tubes but learning and would like to pick up a tester. The guy says he has a Supreme Radio Diagnometer Master Series #301 by Supreme Instruments in a nice oak box and also a Supreme Model #35 tester. Anyone know anything about these, such as possible price and value to me so that I can test the 6922, 7308 E88cc type tubes that my preamp uses? I know enough to know that I should go over and see the stuff and take down some model numbers and tube numbers to have a better idea of what has got. Any help even pointing me in the correct direction would be of great help. Thanks
I do not think the Supreme Model #35 will test 6DJ8/6922/7308 tubes.

Still might be worth owning though especially if it is in decent shape. Made in 1935.
Supreme Tube Testers
Eicos are the best fimds because they are cheap
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I second the little B&K 606. And you can easily calibrate it yourself.
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Thank you all for your responses. I will look into the suggestions
I purchased a B&K 606 on ebay and used it for the first time tonight. What a sweet little unit. Very easy to understand and use. Only two things I am not sure of. One is it says to wait for the tube to warm up. I assume that means about a minute - but I know some feel that tubes take 30 minutes to fully warm. Anyone know how long to warm before performing a test?
Second is in the middle of the socket bank, there is an 6 inch wire with a cap sticking out. There is no reference in the instructions to what that is for. Anyone know?
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What about the AT1000? Isn’t this a prima tester for audio use?
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