You are qualified for the Visa Waiver Program so rather than a visa, you may apply for an ESTA online. The Visa Finder tool can help you locate the visa most likely to satisfy your particular conditions. So you've just realised that you've got no Visa arranged for your journey. It could be tempting to pick an inexpensive immigration agent, but cheaper agents are much more likely to be unregistered. The many visa types have their own unusual requirements and therefore, you need to examine the official Australian Visa website to ensure you have all the required documents. It can be difficult even to work out which type of visa you really need and ought to be applying for.