Master Trader/Fallout

Master Trader is a perk in Fallout.

Effect
Adds a -25% discount to purchased items. The actual discount varies between 15 and 30%, as the game appears to apply the cumulatively, rather than sequentially. The Fallout 2 manual incorrectly states that this perk makes the player's own items more valuable, and that the Barter requirement is 60%.

Fallout: This perk adds the equivalent of 25 invisible skill points to the player's Barter skill when determining prices.

Either way, the perk is functionally useless, as there is no shortage of money in the games, and the original Fallout barter system made it easy to make a profit early game with moderate barter skill.