If the determination is against the sale, all proceedings thereon shall terminate. If the commission determines in favor of the sale by at least a two-thirds vote of the full commission, it shall in its discretion, either enter an order fixing a period, not less than twenty nor more than thirty days from the date of the order, during which bids will be received for the property or any part thereof, and give notice thereof in the same manner as for the hearing on the proposal to sell or negotiate the sale with an appropriate purchaser, provided that in any such negotiated sale the purchase price must not be less than the fair market value of the property which shall be determined by an average of at least two independent appraisals performed by licensed real estate brokers or professionally designated real estate appraisers as defined in *RCW
74.46.020. Whether the property is sold by competitive bidding or negotiation, other real property conveyed by the purchaser to the commission may constitute all or a portion of the consideration for the sale.