I looked through the help PDF, and found nothing. I grepped through all the extracted game files, and found nothing. So I’m totally stumped on how to alter the contents of vendors’ offerings.
What I want to do is increase the spawn rate of green items, to make vendor farming less time consuming. I figure that perhaps tripling the spawn rate of greens will be sufficient, so you’re likely to get more than a single green ring, or the occasional 2 green weapons per reset.
I don’t want to reduce the prices, or turn every item into a green. I just want to make farming for good resist gear or double-rare weapons somewhat less frustrating.