A private blood test that reports total serum testosterone costs between 50-100 dollars, and requires going into a lab to get blood drawn. If the cue is accurate this it will be ridiculously better.
That's true, but the motivations here are quite different. I wouldn't go to a lab just to check if I am properly recovered from a workout [1] or to check if the kids have the flu.
[1] that's assuming that a free testosterone test can tell you that.