Idea for a minor enhancement:
When xu4 asks how many gp you want to pay to a reagent
vendor, pressing Enter should pay the correct amount.
In u4 dos, pressing Enter is the same as paying 0 gp.
As default behavior, I'd say not. '0gp on enter' was intended. The reagent vendor serves as one of the tests for the Honesty virtue. Doing a good deed should require some effort ;)
Perhaps it could be added under one of the existing Game Enhancement options. I'll wait and see what the project boss-folk think before working on this.
p.s. wow, some of the untouched items on this tracker are positively -ancient-. I almost feel bad for re-awakening one with a comment.