Grass S88 Stimulator - $80 (richmond / point / annex)

Clearing out a studio and this piece of electronics showed up.
They seem to have value.
See them on Ebay for $250 Untested but powers on.
Wish I knew how to tell if it worked because they are valued many hundreds higher.
I just want to sell it so I listed it cheap.
This is a Square pulse stimulator used in neuroscience, physiological psychology, and behavioral psychology research laboratories around the world.
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