Update: BLACK20 code expired. Use EXCHANGE20.
I was looking for a wide Brooks Adrenaline GTS 21 Mens running shoes, and this store seems to be the cheapest.
Also, seems to have lots of sizes/model available at the time of posting.
Store pick-up option available if you are in VIC/Clayton, if not $9.50 for standard delivery (2-5 business days).
Onsport seems to be overall cheapest(including free shipping @ $167.97 but did not have lots of options/sizes available)
Rebel Sports are doing second pair at half price, but will end up costing @ $179.99 (and you have to buy 2. Limited models)
Athlete's foot are doing $30 off today, but not the cheapest.
I hope someone finds this helpful.
Edit: Thanks @pennypincher. 20% off at Brooks(Code BFCM) brings it down to $183.96 (all models/sizes available)