I had a buyer commit to purchase our on-site caravan. He paid a $500 deposit and pulled out a couple of days later and now wants his deposit back. He claims the van is not as safe as I made out (it sits in front of a sea wall) and I misrepresented the facts (mainly the possibility of storm surges and its impact on the van) of which I explained everything to the best of my knowledge. He also claims I need to provide a receipt (which I did but he failed to collect). He is threatening magistrates, lawyers and even a local newspaper be involved. Do I need to return the money under Australian Consumer Law? We had a verbal agreement and he pulled due to a change of mind as far as I'm concerned!