West Coast Brewers did one a few years ago, which is where I got 5 of my kegs. Not sure who organised it but from memory they imported a pallette in from overseas and sold them off at $45 each IIRC.
I got some of those cb bulk buy kegs, iirc they may have been a one off of German sourced kegs. You should ask the major suppliers about what would have to happen to get one going. I'm sure you could get heaps of interest on this forum.
I only paid $40 a keg when I got mine, but he said if I ever wanted more to give him a call (http://dealspace.com.au/contact) and he'd do a better price than what he has on ebay.