Karl,
Correct. Those are the GE comparators. These are the newer units that are black in color and have updated cards with LEDs on them. The older units are gray in color and have cards with incandescent lamps on them.
I personally wouldn't pay more than about $150-200 for one of them.
Chris
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Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)