The Kevin Back boat has been either for sale for a long time or it gets sold again very quickly after having been bought. The price is a bit too top heavy for what it is, after all, unknown design from an unknown builder, which I think makes it the only one in existence. Knock ten grand off and you may be getting in the ball park.
It got a mention in this thread, (
www.seabreeze.com.au/forums/Sailing/General/Starter-Sail-Boat/)but of course the ad is now date expired and you can't see what he was asking for it then. From memory I think it was about what he's asking now.