![[Linked Image from i.imgur.com]](https://i.imgur.com/tBQ3PeD.png)
I made this spreadsheet showing how charisma and vendor attitude affects the cost of buying items and the return you get for selling them. The lower your charisma and vendor attitude the less they'll pay for your stuff and the more items will cost. This attitude system is much like DOS2 in this regard. You can check your attitude with a vendor by right clicking them and selecting examine. Donating items by putting them in the barter window and selecting barter without hitting the scales so you get nothing back will raise your faction. When you leave the vendor screen it won't show you your new faction level until you select another char and then go back to that char. Faction is only increased on the donation char, not your whole party.
Any toon of any charisma can buy attitude to max for 200G. The game does track this value over more than 1 transaction with the vendor changes appearing to scale up to max. You can do this directly by just giving the vendor 200G in one go or over time in the form of gold directly and/or items. The "value" of an item toward buying attitude is the amount shown in the vendor trade screen when you add it to a sell slot NOT the value listed on the item itself. As shown in the data above lower charisma toons will have to donate more in items to max attitude since the items "value" is less.