I just bought a secondhand car from a big professional car dealership. Part of the deal was trading in my old car. I put a deposit on the new car at the end of February, signing the deals on the trade in, etc ., then. It took just over three weeks to finalise the deal and I now own the new car outright ( no loans, etc.) and they have accepted the old car. All signed sealed and delivered. The car dealership just rang me to let me know that they have found out that the old car was (unbeknownst to me) previously declared a repairable write-off and they cannot legally sell it, and now want to negotiate some other deal with me regarding the old car. They have had plenty of time (over 3 weeks) to find out anything about the old car Do I have any legal Australian Consumer Law obligation to them?