I was at Myer at around 5pm today, and the comment was posted at around 7pm.
Unless there's a Christmas sale coming up soon, it might be worth waiting for the Boxing Day sale to snap up TR Soundwave; for those gunning for one.
I got mine cheap off eBay for $60. Personally I wouldn't pay Myer's full price for TR Soundwave (unless I was a hardcore Soundwave fan who didn't collect anything else).