The Good Guys are currently having an Ebay sale with coupon code CBIGXMAS for 20% off till 2nd December.
They dropped their price for the GoPro Hero3+ Silver Edition to $359 this afternoon, after coupon this is $292.20. I've been told that stocks are quite limited via Good Guys call centre.
NOTE:
I managed to get my local officeworks to price match it and this bought it down to $277.59. I think this is one of the cheapest prices around without too much effort/checking. Hopefully the attached receipt will help but even if your officeworks doesn't allow this price match, it's still a pretty good deal with the coupon code from the Good Guys.
http://files.ozbargain.com.au/upload/65481/26912/image1.jpg
You can probably get some of the accessories price matched as well. Officeworks don't sell the Hero4 so can't price match that.
saw this last night but I got the Sony HDR AS20 for $164 instead
http://www.ebay.com.au/itm/Sony-HDRAS20-HDRAS20-Full-HD-Acti…
an older model without GPS but better specs than the equivalent price new Hero HD
EDIT: local TGG was doing good business on the DC44 Animal too…. heaps behind their counter awaiting collection :D