Stop making shit up and then repeating it over and over as if it made any sense to begin with.
This is solid advice, you should follow it.
- implement a less volatile system of "price fluctuation" and make it PARTY-WIDE rather than single-character-focused, maybe determined by your party's average charisma and/or reputation with the faction/merchant you are dealing with.
Hey, check it out, both of the things you said didn't factor into your suggestion, all pulled from the original post on the first page... Gee, I wonder where I could have come up such an oddball idea? Oh, I read your post.