Welcome to the Community @david_dickson,
One might wonder why a near new one is on the market as task 1. There would be many legitimate reasons and others not so obvious. Some history re ‘new’ buyers experiences.
Some caravan manufacturers seem to ignore rectification regardless of the state of their so-called warranty.
Noting Community members are not licensed to provide legal advice, just opinions, there is an old topic that is a bit long to wander through but reinforces ‘our’ differences of opinion of the transferability of warranties in various circumstances.
Caravans/RVs are apparently not treated like motor vehicles and I was unable to find an explicit reference to Caravans; maybe someone else has one? In lieu of a definitive statement from the ACCC a used caravan seems to be classed as a second hand good so the T&C may prevail.
