The Legal-Entity offering a Good-Service-or-Money For-Sale in exchange for an Asking-Price.
(<=> (Vendor ?X) (Or (Exists (?Sale) (Sale-Vendor ?Sale ?X)) (Exists (?For-Sale) (For-Sale-Vendor ?For-Sale ?X))))
(Inherited-Facet-Value Slot-Value-Type For-Sale For-Sale-Vendor Legal-Entity) (Inherited-Facet-Value Slot-Cardinality For-Sale For-Sale-Vendor 1)