Fix for merchant price bugs

[ChaosSlayer]

i am looking at new sell prices after thsi patch and it seems to me than vendor now pays you way to much.

with only amiable faction and 100 cha i am geting back like 95% item price, while on most items 50% shoudl be best what you can get.

is it posible to change fixed 1.27 vendor modifier into an X variable and put into rules, so we can customly adjust how much extra vendor will charge/pay?

curent buy back prices way to high - you should only get to 95% buy back with Ally faction and 500 CHA

PS may as well include a rule on MAX % of item price vendor will ever pay regardless your faction