trade.js

/**
 * Gets the average sales price for a good from all entities that are selling it.
 * @param  {int} holdingId The holding id.	 
 * @param  {string} good The good id.
 * @return {numeric}      The average sales price for the good.
 */
getAverageGoodSalesPrice: function(holdingId, good){
	var numSellers = 1;
	var totalPrice = this.getGoodBasePrice(good);

	jg.data.holdings.each(function(holding){
		if (holding.data.id !== holdingId){ //Prevent local price manipulation
			var sales = holding.data.economic.trade.sales;
			if (sales.hasKey(good)){
				totalPrice += sales[good].price;
				numSellers++;
			}
		}
	});

	var averagePrice = totalPrice/numSellers;

	return averagePrice;
},