When you register information for each wine, we ask you to indicate a minimum price. This is the minimum amount you expect to receive per bottle of the wine.
You decide the minimum price.
We do, however, recommend that you start by setting your minimum price equal to your normal export price. In that way you are sure to receive at least what you are used to.
But remember, the minimum price is exactly that, a minimum price you receive. Given the price structure of the marketplace your average price per bottle is very likely to be higher.