Tube Tester Option


https://www.ebay.com/itm/233953776139?chn=ps&mkevt=1&mkcid=28

With all the money I "gamble" on audio, maybe I should just buy this and try it.  
128x128jbhiller
@jbhiller ,
I know, but he would be the best person to ask if it is worth buying.
Why spend $130 when another $100 or so would buy something that can do the job without question.
B
@gndrbob,  I wouldn't think Atmasphere would have tried this product as it's clearly for hobbyist use.  I would think he has a legitimate Hickok or something commercial and substantial.  

I just need something to test my 9 pin preamp tubes.  I have a ton of 12au7 variants that I want to sell as I no longer need them.  I'd like to be able to make an accurate representation about their condition.  And yes, I realize that absent something like TubeZilla at Upscale, nothing is guaranteed accurate and calibrated. 
will this simple unit also test your tubes?

https://www.ebay.com/itm/124523483585?hash=item1cfe2d91c1:g:6hYAAOSwKm9f~K3J

I advise anyone having tube preamp, amp, tuner, phono to get a simple tube tester.

that one looks nice, I want more variety of tube types
If you don't live near a dealer who can test tubes for you a tube tester is not a bad investment. That one looks interesting but a bit limited perhaps look into what else is out there?
I own one of these little testers..  Work quite well. They have a power valve tester also. It does singles.

I have a Multi Miser that I love for power valves. It will do 4 at a time. 

I have a Hickok 539, what a complicated piece.. Maintenance is always an issue and accuracy, is at best within 10-15%.
You have to really pay attention to analog stick meters.. They are not known for accuracy UNLES YOU keep them that way.. ACCURATE

Good investment...
Larryi, I'm most interested in testing small octals so it may work for me. You are right--it's not clear what it does test exactly.  I wish someone had one who could review it. 
It looks like it only tests small octal tubes, and it doesn't say what is tested--transconductance, emission, noise?  These small tubes are the type I would just have spares and I would "test" the tube by occasionally swapping in the spares to see if the sound improves.

I do own a tube tester, which I have lent to a friend who has more uses for it, but, it is quite a bit more expensive than the model you show (it is an Amplitrex), and can test many tube types, including those with grid caps like the tubes I run.