One who sells real property has a 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.

[(45-801) R.S., sec. 3440; reen. R.C. & C.L., sec. 3441; C.S., sec. 6408; I.C.A., sec. 44-701.]