Any sites to see median prices for last 20 years?

Was wondering if anybody knows of a site/resource where I can see the median prices of a suburb for the last 20 years? Everywhere I've looked (rp data, residex etc) only show the last 10 years.

The reason i'm after 20 years is I want to see the property prices right before and after the last boom in early 00's. All the reports now only show from 2005 onwards.

Thanks.
CTN
 
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