I have seen the geophones on: 

http://www.seismicnet.com/geophone/index.html

I was wondering what other people have.  I am looking
for something about 25mm in diameter and 33mm in
height.  Pluses-or-minuses to those dimensions are
just fine.  If you have one or more you can part with,
please let me know and provide details - how much for
the device and approximately how much for shipping to
Idaho.

Thanks!

Greg

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