You may add as many items as you wish in your Event Store.
For each item you may:
Name your item
Add a short description
Add an image
Set stock levels
Put items ‘on sale’ by discounting them
Suspend sale of an item
Have item ‘force added’ to registration (upon request)
Request an item be shipped / add shipping charges
You are not able to:
Increase prices (you would need to suspend and create a new item)
Delete an item (only suspend its sale which hides it from the public)
Offer prohibited, illegal or non-existent items for sale