Sportsbet will give you odds of 24.24 on the multi for all 5 games to go our way, which is an implied probability of 4.13%.
First time I've looked at Sportsbet. I was just curious on what the probability is of this happening, and I'm not Rain Man. 5-6% is a great estimate... and probably close to the actual probability once sportsbet margin is factored in.
I did similar on TAB and it came out to just under $15 - Collingwood and Melbourne have both drifted out since, so the same multi is now at just under $20.
Adjusting for the fact the bookies give crap value because the whole system is a rort, fair value is around $25 - so yes, around about a 4% chance!
I like those odds.