Attitude while your level is low
Traders keep an attitude number. Higher attitude means you pay less and they pay more. The trade window lets you gift gold or goods. The same gift moves that number further while your level is still low. Do it the first time you meet Arron in the Emerald Grove, before a pile of level-ups.
There is no single donation total on this page. Gift small valuables until the attitude number stops rising.
What is worth carrying
Gems, incense, silverware, scrolls, and potions are light for the gold a trader pays. Armour you will not wear is heavy. Sell those pieces at the grove or at the goblin camp before you walk the Underdark.
Three early buys, once the seller is in front of you: the Ring of Flinging from Arron, the Returning Pike from Grat the Trader in the goblin camp, and the Caustic Band from Derryth Bonecloak in the myconid colony.
Many traders refresh the goods on the shelves and the gold in the purse when you take a long rest, and again when you level up.
Sleight of hand, and two things left off
Turn-based mode holds nearby patrols still while you line up a check. Let the party's face hold the trader in conversation. The character with Sleight of Hand stands outside the vision cone. The stealth page is the cone and the light.
A failed check against Withers does not make him hostile. The check gets harder as more of the gold you paid him comes back. Respec is 100 gold. Resurrection is 200 gold.
Container trades that are supposed to hand the goods back for free stay off this page. Reports of them disagree from one version to another, so they are not written up as a method.
There is no redeem code for gold.
Official site: baldursgate3.game.