Coinjar.com or coinjar.com.au seems to be a registered business in Australia. It seems great as you can put your BTC there in fiat without worrying about losing money when the price drops. You can also withdraw the BTC to your bank account. But I'm not sure how much I can trust this site? How long have they been around? Is it safe to store a good amount of BTCs there? Any of you have any experiences with them?
If this is a registered company ,then it is under regulation by the government and should be safe for all users we had one similar to coinjar and have been trading my bitcoin to our local currency and have not encountered any issue but of course since they are compliant,they are verifying their users.