In case any property shall be bid in by the district as provided in Section 5 [73-11-42 N.M. Stat. Ann.], the duplicate certificate of sale shall be sold by the assessor-collector to any person who shall pay the face value thereof with accrued interest; and if the same cannot be sold at private sale within one year from the date of such certificate, the said certificate shall be sold at public auction to the highest bidder for cash by the assessor- collector, or his successor in office at the time of making sales of property for delinquent taxes, assessments and levies for the succeeding year.