You can purchase digital keys or physical copies from these reliable retailers:
Farming Simulator 17 (Global) (PC / Mac) - Official Website - Digital Key Farming Simulator 17 PC Game Free DOwnload
: Sells the Windows 10 version, which occasionally goes on sale for under $10.00. You can purchase digital keys or physical copies
: Buy the game from one of the official stores listed above. Farming Simulator 17 PC Game Free DOwnload