My friend and I noticed that a thread on OzBargain popped up about MW3 for xbox and PS3 for $25 from Harvey Norman, somewhere in WA. We went to Harvery Norman in Preston (Melbourne) and asked if they'd price match for either PS3/xbox/PC. No dice. Same story at JB Preston, however the guy said that if we could get a receipt, he'd be more than happy to do it.
Later in the day we were bored, and after quickly giving up on the idea of building a motorised scooter, we had another look at OzBargain. To our pleasant surprise, someone had gotten a price match from a different HN in WA. We went back to JB Preston, found the same guy and he put it through for us.
Here's the deal we posted if you're interested in getting a cheap copy:
(Don't think this really classifies as advertising, just sharing the joy. Please feel free to remove though if it's breaking any rules)