(a) Rights accruing before death; purchase money obligation.--Nothing in Subchapter A of this chapter¹ (relating to dispositions independent of letters) and this subchapter shall be construed as impairing any lien existing at death for the purchase money of real estate.

(b) Rights accruing after death.--A decree setting apart a family exemption shall be void as against a subsequent bona fide grantee of, or holder of a lien on, real estate, unless the decree granting the exemption from real estate, or a duplicate original or certified copy thereof, is recorded in the deed book in the office of the recorder of deeds in the county in which the real estate lies, within one year after the death of the decedent, or, if thereafter, then before the recording or entering of the instrument or lien under which such grantee or lienholder claims.