For buying souls and gears we need first to JOIN a guild, when you are a member of some guild, then you can buy souls and gears donated by other members or even yourself from Guild Bank. You can also donate gears and souls by going in guild bank and receive Ambers for donating. Its very simple to do, but i will show you how you can do it , watch closely the images below:

Step 1:  Click on the Guild menu in home screen as shown below.

Click the guild menu on home screen

Step 2: Inside guild menu click on guild bank button as shown below:



Step 3:  You can see the guild bank as shown below,