i'm sure someone may be interested in it, and all the other gyroids. throwing them away is pushing it. if J4G isn't willing to wait for the right buyer, they can always just sell them in re-tail. if they decide to do this, i'd recommend waiting until gyroids are on premium to double their earnings. bells are bells regardless of the amount they are and they can add up the more and more they collect.
dekkoids aren't rare, however, so they shouldn't be set at a high price. personally i wouldn't spend over 10k on a gyroid.