How come it's back? Either the seller has a bucketload of em and is offloading them one-by-one to maximise the return (and can see when interest is waning) OR they are placing the highest bid (shill bidding) if it's not reaching what they think is a fair value. Either way you can't lose if you stick to what you think is a fair price to pay for it.

Best way to get to down to Sydney would be to have someone local pick it up then go up one weekend yourself, or get you local guy to plonk it on a McCafferys coach or similar (that tip came from berny I think)