A true ozbargainer would use a safety razor due to the MASSIVE cost savings you get compared to a disposable razor. They are also better for your skin. Buy this safety razor, and you can get 100 blades for less than $10.
The Parker 99r Double Edged Safety Razor is only $22.60 with shipping. However there is free shipping at $30, and you will need to buy some more blades eventually so buy them from here. I got these for $9.25.
Note: the razor does come with a sample set of blades, however I prefer to minimise shipping. Those with beards may also want to look at sharper blades.
This safety razor is usually $38 as found on Pureman.
Does anyone know how these compare to Feather brand blades? I've bought off ebay before and they are pretty good for my facial growth