We are selling several of these, the photo is of a single unit. They are all in the same condition.
Eberline E-520. Geiger Meter to be used with GM probes such as an end window, side window, or pancake style probe. All units have BNC connector. These units don't make any sound when operating. We have speakers available for $25 each plus $5 for the speaker cable if you want to hear the clicks, or you could get a set of headphones. These have the clips installed on the top for a pancake or side window probe. You cannot adjust the high voltage on these. They will only drive GM probes. We offer a 30 day unconditional warrantee.
A manual can be found online here: http://www.webalice.it/carlo.scorsone/Area%20File/Eberline%20E520%20technical%20manual.pdf
Thanks for looking. We have probes available too. Pancakes (HP-260 or equivalent) and side windows (HP-270 or equivalent) are $175 each.X