Iím thinking of selling my 2019 Vespa GTS 300, Yacht Club model. It has roughly 350miles on it. My problem is, I cannot determine what a fair asking price should be. KBB and NADA valuations differ considerably and do not account for accessories like matching Vespa top case, short windscreen, and low mileage. Any advice from the knowledgeable members on this board would be greatly appreciated. Thanks in advance.