I bought a motorcycle off Gumtree for $900. It was a Yamaha wr450. It needed a fair bit of work. I did a ppsr check on it and it came back stating there was no security interest against it. I then spent $1300 fixing it to register it. When I went to the Department of Transport to register it, I was told it hadn't been registered in QLD before and needed to wait for a callback. I was then met by 3 police officers outside who informed me the bike was stolen. After an hour, I was allowed to leave and was met by another police officer at my house who had been waiting there to claim the bike. The police have the details of the person I bought it from (I assume he didn't know it was stolen. When asked, he said no and I met at his house and the receipt was his real name). What grounds do I have under Australian Consumer Law to recover money from purchase and money from fixing the bike (I was not allowed to remove anything off the bike)?