We are specialized in such jobs, but please be a bit more specific. What kind of numbers are you looking for?
"You must be legally allowed to sell me the data and be the owner. You will be selling me the data to use in Australia without any restrictions." ...
This is a grey area. We have spent hundreds of men hours in developing a sophisticated crawler for our own needs. We can collect the data, process it, analyze it and store it in a database. That does not mean we are the "owner" of the data. Even the Australian Telecom is not owner of the data.
1500 USD is really the absolute minimum depending on what you want to accomplish. If someone is bidding for 700 USD, he doesn't know what he is talking about. This requires serious work and solid 2-3 weeks of crawling and analyzing the data. If people think you can enter thousands of numbers manually, they are completely deluded.
Please give me a few more details, so I understand your business a bit better.