All property acquired by the county by tax deed must be appraised by the board of county commissioners at least thirty days before the annual sale under this chapter. The appraised price must be sufficient to cover all taxes, special assessments, homestead credit for special assessments, penalties, interest, and costs which were due against the property at the time of the service of the notice of foreclosure of tax lien, plus an amount equal to the estimated taxes and special assessments for the current assessment year. If the fair market value of the property is more than the total amount due against the property, the minimum sale price of the property must be at least equal to the total amount due against the property. If the fair market value of the property is less than the total amount due against the property, the board shall fix a fair minimum sale price for the property.