Do bear in mind that
the majority of members here already own Spyders, so unless they want to 'upgrade' from an older model or add another Spyder to their stable, most of the members here probably aren't in the buying market (even if they
do want to look at yours & check out what price you're asking

) which means that there's very likely only
a few potential buyers here.
It certainly won't hurt your chances of selling your Spyder by advertising it here, but maybe you need to advertise it elsewhere as well? Have you?