Are you going newer? If so, trade it in to the dealer that will give you the best deal.
If you just want to sell it yourself, get it detailed and buy a trailer for it. Your audience will be very small with no trailer. After that, you may be able to get $24-$28K for it.
BTW, if it has the MCX engine it is 350 hp. That's what my '03 230VRS had. Great boat.
I was njskier on here.