When selling personal property, you must ensure that—
    
    
        
        (a) 
         All sales are made after publicly advertising for bids, except as provided for negotiated sales in  §§ 102-38.100 through 102-38.125; and
     
    
        
        (b) 
         Advertising for bids must permit full and free competition consistent with the value and nature of the property involved.