The basic list of items for sale by all, or most, General Goods Merchants can be found at General Goods Merchants.
To find this Mob in-game, use /where Mima A magical birdie will appear somewhere near you and will guide you to your destination.
Click button for paste-able map link:
This mob is non-social, meaning that if you attack a mob near this mob, whether of the same race/type or not, it will not come to the aid of your target.