[PC] Steam - Hitman GOTY - $15.19 AUD - Fanatical

Not the all time lowest price but still pretty good and the best one currently around.

From the website:

Take on your next assignment, enjoy the ultimate playground as Agent 47 and become a master assassin with HITMAN - Game of the Year Edition - now at the BEST-EVER price for 48 hours or while stocks last!

With this Steam PC key, you'll travel around the globe to exotic locations and eliminate your targets with everything from a katana and a sniper rifle to an exploding golf ball or some expired spaghetti sauce.

PLACES TO GO, PEOPLE TO KILL
Locate your targets in this action-adventure with sandbox-esque environments, and bring them down with traps, distractions and precise accuracy. The less noise you make, the better your score for each assignment.

Toss a coin to lure your target to a secluded spot before silently killing them with your trusted fiber wire, or keep your distance and assassinate them with your sniper. Or, forget the rules of being a silent assassin and blast your way through - you're Agent 47, you can do what you like!

EPISODIC COLLECTION
Enjoy all seven episodes of HITMAN, now in one instant collection. Plus, experience hundreds of additional contracts and challenges.

YOUR OFFICIAL HITMAN - GAME OF THE YEAR EDITION STEAM PC KEY GIVES YOU:

Three new Outfits.
Three new Weapons.
Eight Challenge Packs.
Over 50 Escalation Contracts.
Over 200 Featured Contracts.
Three new Themed Escalation Contracts.
Three bonus missions and a special holiday mission.
Over 700 challenges that award XP and new unlocks.
The 'Patient Zero' campaign featuring four new missions.
Seven exotic locations: ICA Facility, Paris, Sapienza, Marrakesh, Bangkok, Colorado and Hokkaido.

Enjoy!