This is a case I followed from a couple of years ago
THE girlfriend of a missing Mount Gambier ice dealer, feared murdered, yesterday revealed he owed about $100,000, had been bashed and received a death threat.
http://www.theherald.com.au/story/2129059/missing-drug-dealer-owed-100000-feared-for-life/
a quick sleuth on google and there are many like this with amounts from the thousands, to hundreds of thousands....
Thanks for posting up the link. I suppose it's possible, but drugs usually have to be paid for before they are able to get more to supply? Maybe he bought $100,000 worth to distribute and have to collect on, and didn't come through? I read recently that one lady kicked her $1,000 per day Ice habit, so there's big money involved in it.