purchaser” is “[o]ne who buys something for value without notice of another’s claim to the property and without actual or constructive notice of any defects in or infirmities, claims, or equities against the seller’s title; one who has in good faith paid valuable consideration for property without notice of prior adverse claims.” Black’s Law Dictionary 1271 (8th ed.1999). Whether an event is enough to put a purchaser on notice so that a bona fide purchaser “cannot acquire an interest that is superior to the interest of the transferee” is determined, the statute tells us by “applicable law,” 11 U.S.C. § 547(e)(1)(A), which is to say the law of the state where the property is located. See Gen. Motors Acceptance Corp. v. Busenlehner (In re Busenlehner), 918 F.2d 928, 930 (11th Cir. 1991) (<HOLDING>), overruled on other grounds by Fid. Fin.
recognizing that granting of a security interest in real property is a preference under  547 of the bankruptcy code holding that state law determines when perfection occurs for purposes of the preference avoidance provision of the bankruptcy code holding for  1983 actions that although state law determines the limitations period federal law determines when the claim arises holding that state law determines when an interest is perfected when interpreting the preference avoidance provision of the bankruptcy act holding that while state law determines the existence of a claim federal law determines when a claim arises for bankruptcy purposes