New Jersey Statutes Title 54. Taxation 54 § 5-32

The sale shall be made in fee to such person as will purchase the property, subject to redemption at the lowest rate of interest, but in no case in excess of 18% per annum.  If at the sale a person shall offer to purchase subject to redemption at a rate of interest less than 1%, or at no interest, he may, in lieu of any rate of interest to redeem, offer a premium over and above the amount of taxes, assessments or other charges, as in this chapter specified, due the municipality, and the property shall be struck off and sold to the bidder who offers to pay the amount of such taxes, assessments or charges, plus the highest amount of premium.