Fame
Fame is a numerical amount associated with each player through the game and represents their victory points (see Objective).
Actions on the game, notably selling Potions during the Market Phase, can increase a player's Fame.
Therefore, Fame is computed as the game goes, and not all at once at the end of the game.
Players start with zero Fame and cannot go below zero. The amount of Fame is always a natural number.
Players cannot bargain Fame; and normally never lose Fame (though they can due to very niche card effects).