Gillette, WY – A South Dakota company has offered to buy a 19 seat passenger plane co-owned by Campbell and Natrona counties. The two counties bought the plane for one million dollars in 2002 in order to provide flights between Casper, Gillette and Billings, Montana. However, the plane lost money on that route while Big Sky Airlines operated it for nine months. Sioux Falls-based Business Aviation Services has offered to purchase the plane for 450 thousand dollars. The Natrona County International Airport board and Natrona County Commission have given initial approval to the sale. Campbell county officials are deliberating whether 450 thousand dollars is a fair asking price.