If you are in Brisbane, my advice is not to touch it - absolute lemon, but pass on the details to me.
But how much would i pay??? Depends on the situation. If from a dealer then it wont be such a bargain, but if its a private sale from a non pinhead, then id be aiming to get it for $500 or so - id go to $800 on the outside.
Its always best ive found to get an idea of price from the seller - theyll give you what theyd love to squeeze out of you. Normally, you can half this price straight away.
Good luck - hope your bartering skills are well tuned.
Bottom line is... how much is it worth to you??