When you happen upon a shop, the SHOP button will appear at the bottom of the screen. To enter the shop, click on the SHOP button.
 
The shop is a place where you can buy and sell weapons, armor, magic and a variety of other things.
To buy or sell items, select the PC who wishes to buy or sell on the left side and make sure the shop keeper is displayed on the right. You may now buy or sell by dragging items left or right as you wish. To trade between PCs, place one on either side, and drag items left or right to trade.
NOTE: If a selected item is not usable by the character on the other side of the trade/shop screen, the cursor will change to a small red stop sign. The character will still be able to buy or obtain the unusable item. This is only a warning flag to show whether an item is usable or not, so you don't accidentally obtain an item for a PC that they cannot use.
NOTE: If an item is equipped, it must be unequipped before it can be traded or sold. To equip or remove items while in either the shop or trade screen, hold down the command key and click the desired item. It will then be equipped or removed.
When selling items, the shopkeeper will make an offer to buy the specific item. If you choose to sell that item, the selling price will be added to the money pool. When purchasing items, the required funds will be deducted from the character and the money pool automatically.
AV Mac Users: The following note may be of real interest to you. This will allow you to deal in the shops without having to drag items.
NOTE: You may hold the shift key down when clicking on an item to pass it to the other side more quickly. If the shop keeper is on the other side you will buy or sell the item. This is quite a bit quicker than dragging items back and forth, but you do not get to see the cost, offer and weight of the item being traded, bought or sold.
Note: You may also hold the Option key and click on an item to bring up the fact sheet. Option click will bring up the fact sheet in the items and treasure collection screens as well.
Money Changing
If you find yourself being bogged down by lots of gold, you can trade in gold for gems. You may change money whenever there is a shop or temple available to the party. To do so, click the money bag icon. This will take you to the money swap screen. Here you can trade money between the money pool and the PCs. If a shop or temple is available, you may change gold in for gems and vice versa. You may also trade jewelry in for gems, but never gems in for jewels. This is handy because gold is quite heavy. As the party accumulates wealth, you will find that the sheer weight of gold will reduce your PCs to pack mules. Therefore, trade up to gems whenever possible. NOTE: It takes 115 gold to purchase a 100 GP gem, so only trade gold in for gems when it is warranted, because you do lose a bit in the trade.
