I recently acquired a Shure Bros. 708a Stratoliner crystal mic on a s36 base. I believe the impedance would be about 50K ohms and I was wondering if I should try a basic restore job or just try to sell it? I have yet to test the crystal element but it appears to be in clean, untouched shape, untested by me thus far.

What would you guys do with such a mic? I'm open to any and all suggestions.