[GAMESPLANET] Quantum Break is 79% off currently (US$8.50/ £6.50/ 7.99€)

https://us.gamesplanet.com/game/quantum-break-steam-key--3113-1

Deal ends May 15th at 1am PDT / 9am BST

NOTE: You'll need a Gamesplanet account to buy it.
Also, you can change the currency by clicking on the flag beside "My Cart"

Regarding region restrictions, this is from their FAQ:

Yes, you can order our products from wherever you are in the world. The Internet has no borders for Games(planet).
If you want to know if a game has any region restrictions, you can find that out in the box with the orange border on the game's page. If there is no box, there are no restrictions. But feel free to ask us anyway - we can confirm region restrictions for each game at our website.

Since there's no orange box on the page, there should be no region locks