The sale price for goods does depend very much on how much you sell! The formula in the rulebook does reflect supply and demand, so if you sell 1,000 units you will get a lower price per unit than if you sell one unit only!
To get the most money out of trading itís better to sell a lot of small amounts many times than one large amount once. So instead of selling 1,000 units in one order, you will get more money if you sell 100 units ten times! To help us input all the multiple orders, itís best to write Ďten timesí next to the order you wish to repeat, and weíll then duplicate it ten times (or however many times you want). You are still limited to just the normal 18 trade commands, however!