It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

ZenScript
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import crafttweaker.api.villager.trade.type.BasicItemListing;

BasicItemListing implements the following interfaces. That means all methods defined in these interfaces are also available in BasicItemListing

• ItemListing

ZenScript
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new BasicItemListing(price as ItemStack, price2 as ItemStack, forSale as ItemStack, maxTrades as int, xp as int, priceMult as float) as BasicItemListing
new BasicItemListing(<item:minecraft:diamond>, <item:minecraft:diamond>, <item:minecraft:diamond>, 8, 2, 0.05);

Parametro	Tipo	Descrizione
Parametro price	Tipo ItemStack	Descrizione The primary Item that is being given to the villager
Parametro price2	Tipo ItemStack	Descrizione The secondary item that is being given to the villager
Parametro forSale	Tipo ItemStack	Descrizione The Item that is being sold by the villager
Parametro maxTrades	Tipo int	Descrizione How many times can this trade be used
Parametro xp	Tipo int	Descrizione How much experience does this trade reward the villager
Parametro priceMult	Tipo float	Descrizione How much the price is affected by demand, Hero of the Village, and village reputation