Check the listing for details. AAG 1-Wire Wind Instrument Two Units, One New, One Used For Parts. Condition: New – Open box. Listed at 125.00 USD. See photos There are two units One is new and never used Items still in plastic are unopened I don’t know much about this I believe it records windspeed over time and is used for data collection for siting a wind turbine or other wind power measurements It is perhaps 15-20 years old, but unused The second one is the same but unit was used for about 18 months. It is missing a metal brace and maybe some fasteners, but has most of the other parts; so I would consider this to be just a set of spare parts. But perhaps with some handy work can be made into a second unitSee photos There are two units One is new and never used Items still in plastic are unopened I don’t know much about this I believe it records windspeed over time and is used for data collection for siting a wind turbine or other wind power measurements It is perhaps 15-20 years old, but unused The second one is the same but unit was used for about 18 months. It is missing a metal brace and maybe some fasteners, but has most of the other parts; so I would consider this to be just a set of spare parts. But perhaps with some handy work can be made into a second unit