Like a broken record, I keep on saying anyone with tube equipment should buy their own tube tester.
I had a nice 666 Eico tester. I didn't use it much. I buy new production tubes from very reliable sources and I have only had one issue with a noisy preamp tube. The tube tester doesn't insure quiet tubes because it's the function of the preamp circuit that determines that. Listening is the only way sometimes. I've also blown power tubes, that is spectacular and no measurements are needed, the whole tube bank gets replaced at that point. Bottom line...I have no tester and really not missing it.