When a purchaser at a treasurer's sale of unseated lands shall have paid taxes on the land purchased by him, which have accrued since the sale and before the time allowed to redeem has expired, the owner or person redeeming shall pay, together with the redemption money, to the treasurer, all taxes which may have been paid by the purchaser, and the treasurer shall pay the same to the purchaser with said redemption money, when called for.
72 P.S. § 6099