Card singles price settings

Open the Sell Prices menu, and do the following:
In the Card Condition menu, set the price multiplier for each card condition as a percentage.
Press the "Save Changes" button.
In the Rounding menu, set the rounding multiple for all generated card single prices.
Press the "Save Changes" button
In the Update & Margin menu, set the margin (percentage added to the market price) for each card game. 
Leave the "Enable singles price update" checked. Press the "Save Changes" button for each game.
In the Exchange Rate menu, you can set a manual exchange rate or use the automatically retrieved rate, which is updated daily.
In the Rarities menu, set the price floor (minimum price) for each rarity within each game.