http://search.carsguide.news.com.au/news/find-a-car/power-search/search-results.do?searchType=4&clearCompare=true&pageSize=&view=2&make=PONTIAC&model=&yearFrom=1970&yearTo=2005&loc ation=Any+Location&priceFrom=2500&priceTo=100000

Assuming the AU$ is roughly 1/2 of the US$, most of those prices aren't bad assuming the cars are in good shape. The last one (priced at $22,500) seems a bit high but it's already converted to RHD and I don't know how much the conversion costs.

the Aussie dollar is about 74 US cents