Tradingpost has 0 Audi S3 cars for sale between $20,000 and $30,000 in Nowra-Bomaderry, NSW. As Australia's favourite way to buy and sell for over 50 years, Tradingpost is the trusted way to sell your current car, and find your next car at a great price! When looking to buy or sell a Audi S3 always be sure to check out the wide range listed on Tradingpost!