Footnote: Please see bundles prior to purchasing; they include the original game as well as DLC - some big discounts available.
Euro Truck Simulator 2 is down to £3.74 on Steam (normally £14.99). Offer ends 6th April.
https://store.steampowered.com/app/227300/Euro_Truck_Simulator_2/
ETS2 bundles:
Essentials Bundle at £10.86 (normally £45.24) https://store.steampowered.com/bundle/1923/Euro_Truck_Simulator_2_Essentials/
Black Sea Bundle at £16.28 (normally £38.84) https://store.steampowered.com/bundle/12843/Black_Sea_Bundle/