Whenever real estate is sold to collect taxes as provided in N.H. Rev. Stat. Chapter 80 advertisements thereof shall be posted in the nearest town in the same county in which the superior court is located and be published once a week for 2 successive weeks in a newspaper having general circulation in the county where the real estate is situated. The last publication shall be at least 7 days before the date of the said sale. The sale shall be at the office of the commissioners of the county in which the real estate is situated. The provisions of N.H. Rev. Stat. Chapter 80 relative to advertising, conducting and reporting tax sales shall apply except as modified in this section.