ok now i understand, i was sure i was missing something along the way lol.
As i live in europe i wasnt aware of the exchange currency issue, and quite honestly i try never to get "exclusive items" for the game as i always find they actualy take away some of the fun of the game, normaly those sets feels "displaced" or even something "cheating" about using them.
And, of course, i rather give full money to larian directly, instead of feeding distribution channels that sometimes take away too much percentages from the deals...
