need to purchase a calibrated , small signal tube tester-why so difficult?!

Tired of not being able to test my own tubes.

I know enough to not just blindly go to ebay and buy a vintage one….even if says “calibrated.” I’ve contacted some of the legacy folks/sources, they really don’t seem interested in making money.

Any recommendations to get me into an affordable, accurate, and easy to use tester? I don’t care if it’s rusty or anything else, if it works reliably . im willing to pay $500-750 ish——-for emissions and conductance capability.

Is this too much to ask?! Where to go?  Other advice re. which testers may be moost appropriate, and why, would be more than welcomed,