Notice of the adoption of the resolution and of the time and place of holding the meeting shall be given by posting copies of the resolution signed by the chairman of the board in three public places in the county, not less than 15 days before the date of the meeting, and by publishing the notice in the county pursuant to Section 6063. In addition, the board may purchase advertising space and may advertise the proposed sale or lease of the property in such newspapers, magazines, and other periodicals as, in their judgment, will best publicize the sale or lease to those persons most likely to bid for, purchase or lease the property.