My opinion will probably seem biased, but oh well.
Be careful of ordering online, especially internationally. With Australian companies its not so bad, because the government has plenty of rules and regulations to filter out the baddies.
I personally recommend getting their ABN/ACN, and their fixed line number [eg. (07) 3333 6666]. Make sure you talk to them on that number. If they were to do a runner, you can report their ABN/ACN or fixed line number to the police, and it'd be easier for them to track the business down. If they can not track them down, with the information you provided them, they should be able to return your money by seizing their assets.
Ask the online business if you can go over and pick it up from them also. If they panic, its a bad sign. Most online business's run from a garage/home office (like mine) and they'd be more than happy for you to rock up. They just don't have a big sign saying their name, as their not openly open to the public or operate fulltime.
Just my bit of advice.
I hope it helps.