Whiskas: Long story short, i am from Germany, W3 pre-order costs 46 euro. Friend of mine is from Ukraine - and price there is 15 euro. He can buy game for me as a gift. Wouldn't it be against GOG policy? Will i be able to access the game from my account? Is there differences between UA and EU versions?
The real question is, how much is the game worth to you, and how much can you afford to spend? If you don't mind spending 40-60 bucks on other AAA games, then Witcher 3 certainly seems worthy of that price tag.
If you're honestly "poor" and can't afford to spend that much on a single game, and the only alternative would be to get the game from some file-sharing site, then paying something is better than paying nothing, I suppose. But if you can afford it, then please do support the devs.