A reserve price is the minimum price the seller will accept. This price is hidden from bidders. To win, a bidder must have the highest bid and have met or exceeded the reserve price.
Here is a lot of 6 Victoreen Instrument Co Civil Defense O.C.D. CDV-717 Geiger Counter Radiological Survey Meter Radiaton Detectors. 5 are model CDV 717 and 1 is a CDV 715. None of these passed the circuit check when tested, and are as-is for parts/restoration. May just have some corrosion in the battery compartments or pieces that can be cleaned. They are minus the plastic detector knobs. A good lot maybe you can repair or restore these.