Whenever the board of county commissioners of any such county shall determine, by resolution, that a county barn and welfare office and the lots of the sites upon which the same are situated are no longer needed for county purposes, said board may sell and convey such property in the manner provided by Kan. Stat. Ann. §§ 19-211 and as provided in this act, except that such sale may be made without submitting the question of such sale to a vote of the electors of the county. Before making any such sale the value of the property shall be appraised by three (3) legal electors of the county qualified to make such appraisal and appointed by the district judge of the district court of such county, and no such sale shall be made for an amount less than three-fourths (3/4) of the appraised value of the property. All moneys derived from such sale, after deducting the costs of the sale, shall be paid into the county treasury and the county treasurer shall credit the same to a special fund for building and equipping a shop for the county road and highway department.