Okla. Stat. tit. 42, § 42-26: Vendor's lien for price of realty

One who sells real property has a special or vendor's lien

thereon, independent of possession, for so much of the price as

remains unpaid and unsecured, otherwise than by the personal

obligation of the buyer, subject to the rights of purchasers and

encumbrancers, in good faith, without notice.