ok...too much fun.

starting with a 1978 hz 5 litre 4speed price of $8,768 when new and compounding the actual Astralian inflation rate for 30 years since 1978. Your Sandman should sell for $34575 in 2008 (new condition).

Not such a good investment after all. Could just save and invest and get more.

I can add afew more years with some extra research.