1997tripleblackcobraconvert600miles

Looking for any advice on the value of my 1997 cobra convertible its triple black.Bought as an investment been garaged and only driven 600 miles.Tops been down once still smells new.Have all original paperwork,boot cover and bra-never put on car.Obviously wasnt a good investment but I was hoping a mustang museum would buy it around 19k?Any advice greatly appreciated.Car is in Avon Park Florida.Thanks,Mike