Complete GTA Collection (PC) $12.49 USD ~ $12.24 AU GamersGate
This is the complete collection of all but one of the (the london expansion for the first) GTA games for the pc.
The link above does not include my referal code if you wish to use it ,no benefit to you as far as i can see, please use this link.
The first 2 games can be gotten free legaly from here: http://www.rockstargames.com/classics/
There is also a bundle that only includes up to San Andreas for ~ $7.38 AU here
http://www.gamersgate.com/DDB-GTAC/grand-theft-auto-classics... (No referal code)