Tyrebuy.com - 225/40 R18 Goodyear Eagle F1 Asymmetric 2 @ $159ea
Great price on one of the best regarded tyres available. This is a pretty popular size (just collected a set of 4 myself) but there are other sizes and other brands available as well which also seem to be very keenly priced.
They are a WA based operation, but shipping to other states seems to be available and reasonably priced too.
Hope this is use to some people.
Edit(1): The ones I picked up are German made and have a manufacture date stamp of '2814' - being the 28th week of 2014.
Edit(2): Have removed the expiry date as the post 'best buy' price still seems to be $159.