Leviticus 25:16

25:16 The more years there are, the more you may make its purchase price, and the fewer years there are, the less you must make its purchase price, because he is only selling to you a number of years of produce.

Leviticus 25:52

25:52 but if only a few years remain until the jubilee, he must calculate for himself in keeping with the remaining years and refund it for his redemption.