320.30  Penalty for violating s. 320.28.--No action or right of action to recover any such motor vehicle, or any part of the selling price thereof, shall be maintained in the courts of this state by any such dealer or vendor or his or her successors or assigns in any case wherein such vendor or dealer shall have failed to comply with the terms and provisions of s. 320.28, and in addition thereto, such vendor or dealer, upon conviction for the violation of any of the provisions of said sections, shall be guilty of a misdemeanor of the second degree, punishable as provided in s. 775.082 or s. 775.083. However, this section shall not apply to the holder of a note or notes representing a portion of the purchase price of such motor vehicle when the owner thereof was and is a bona fide purchaser of said note or notes, before maturity, for value and without knowledge that the vendor of such vehicle had not complied with said sections.