I dunno how much it will cost, but $100- $150....seems reasonable. I suppose, it depends on whether EMI AUS release it whether music shops have to get import versions, which will make for a very nasty price tag.
I think the box set is fantastic.
The greatest hits does seem *sell out*, but we have to remember they are saying it isnt for the old fans, but targeted at a new generation of fans they want to reach, and there is NOTHING wrong with that IMO.