Steampowered.com (US) has the Rockstar Games Collection PC for $42.49 downloaded.
Note: this is from the US store and apparently, as per other deals, not all credit cards will work.
Have not tried to get this myself but noticed others have posted similar deals regarding Steam USA.

http://store.steampowered.com/sub/4247/?cc=us

Includes:
Grand Theft Auto 1,
GTA2,
GTA3,
GTA: San Andreas,
GTA: Vice City,
GTA4,
GTA: Episodes from Liberty City,
Manhunt,
Max Payne 1 and 2,
Midnight Club 2,
While Metal,
Bully: Scholarship Edition.

Individual price quoted by Steam is USD$169.90.
You save USD$127.41



Follow this link for the deal site. This is an Australian based deal so don't bother if you aren't Aussie