Further to what he mentioned. Prices msut be set by the publisher otherwise the game will NOT be available at all in your market, now that the currency shift has come into affect.
Next big Steam sale is on right now, worldwide http://store.steampowered.com/sale/playwsteammachines/ I just checked with my friend in US, many games are about 20%+ cheaper in India even now.That has never happened and probably won't happen either, although it'd be interesting to see how things turn out in the next big Steam sale.
Most of us bought Witcher 3 from retail since it was Rs 1500 from retail and $60 in Steam. Now the retail gives GOG keys and Steam DLCs are not compatible with it. Would have bought the season pass if it were not so. Very good price nonetheless.
I once got a GOG key for my Witcher 2 Steam key. As in i had the steam key and got GOG key free. Any idea if that is possible for the season pass?
Then i could buy the season pass on steam and redeem it on GOG.
EDIT: i think this is only valid for wither 1 & 2. http://www.gog.com/witcher/backup
The boxed PC version of the game is compatible only with the Expansion Pass sold on GOG.com