AI market pricing and goods trading¶

This article describes the AI’s market behavior. The AI buys and sells resources using the game’s shared price table. Its trade routines handle storage and gold accounting; the decision to trade is made by their AI callers.

Function	Crusader 1.41 address	Behavior
`GameStateStructures::getBuyPrice`	`0x004588A0`	Returns `(buyPrice / 5) * amount`.
`GameStateStructures::getSellPrice`	`0x00458910`	Returns `(salesPrice / 5) * amount`.
`AICState::buyGoods`	`0x004CC000`	Attempts resource storage, then deducts gold and displays the trade on success.
`AICState::sellGoods`	`0x004CBFA0`	Credits gold and final-result statistics, removes resources, then displays the trade.

Prices¶

Prices are stored for lots of five goods. The game divides that price by five using integer division, then multiplies by the amount traded. For example, a table price of 14 and a trade of five goods produce a price of 10. The player argument does not affect the price calculation.

AI buying and selling¶

An AI purchase first attempts to store the goods. If storage fails, it returns without deducting gold or displaying a trade. The routine itself does not check whether the player can afford the purchase. Successful purchases reduce both the player’s gold and their net market-gold total.

An AI sale increases those two totals and the final-results gold statistic, then removes the sold goods. Both successful purchases and sales display the trade amount to the player.