To create shops is easy.Firstly you need to build an outer and an inner.I can't give you much help with that except maybe with chipsets.

Anyways,after you have made you shop create an event in the third tile lair(The one tha brings up the grid).Make it a person or whatever you want.Then go into it's event coding and simply add this command:Open shop window.From there you can choose what you want to sell there and whether it will buy form you.You can also use custom buy and sell messges.


note:If you are using a counter be sure to check the counter tick in the chipset customization menu.

note2:If you need pictures to better explain just let me know.