in Bg1 and Bg2 the party leader i.e, whichever character is currently in the first [F1] slot is the one used for shopping... even if another character with higher \ lower charisma talks to the shop keeper the leaders charisma is still used
that is the way D&D should work
Yes exactly ! It's such a hassle to have to switch constantly things from one character to the other each time especially, money is short for most of the early access, so we have to optimise each sale, even if it's a goblet...