Where to buy Overwatch?

yes i know.. no steam-game..

still as some friends really really want to play it and they kinda force me to buy it...
i just wanted to ask if someone knows where to get it maybe a tad cheaper than in battlenet?
as i am from eu i got to pay nearly 40€ for it :/
kinguin would sell it for like 37€ but i never had anything to do with that site :/

also.. i read some redditthread about the followin:
its is possible &legit to make an account in f.ex. mexico pay with creditcard and then gift the game saving about 15$
dont know if that works tough..

tl:dr; anY tipp on how to get it cheaper?

Love and thanks

@supports: if this topic is in the wrong category, please be kind and move it to the correct one :/