STAX UA-7CF Tonearm, worth buying or no?

Hello STAX guys ! I just ID'ed this TA with the CF section on a Sota Sapphire series 2 circa 1986. Stan's got a good 10 years on me. I got into real stereo in 1976, Sansui 8080DB, Dual CS522, Cizek Model 1's. Still have them but they are in pre-retirement. Glad I can get the TT going to remind me of the good ol days. Stan (yes another one). 

Hi,
The Stax UA7-CF has surprisingly high effective mass for a carbon fiber type. It is sixteen grams, which enables it to be used with many of the heavier modern moving coils. As I understand it, the CF model was produced only in response to complaints that some setups revealed a bit of unwanted resonance in the standard aluminum wand UA-7, so both models have essentially the same mass. I own two of the standard UA-7 tonearms, and have not heard the resonance issue, but maybe that is due to my particular setup. I have no doubt that the carbon fiber model is its sonic superior, however. The Stax tonearm of either configuration is extremely well-made with jeweled bearings and first-class construction. It is a keeper, even if you own one of today's better tonearms.

Still a good arm. I still have one of the metal ones left from when I was a dealer. It would be at least as good as the tables you mention. It will work on about anything. I have forgotten the arm mass for the CF version, I think it was lower than the metal. What price ar you paying?