Sorry about that. Yes, as Thomas says, while you're in TBA building your zone, type HELP SEDIT. For more helpful files, type HINDEX SHOP and HINDEX SEDIT. The help files are a good source of information.
There are different ways to allow access to your items such as:
reset them somewhere although resetting in a container has some weirdnesses involved. Just for practice you can reset them in a room where they can just be picked up.
make a trigger which creates it for the player. For example, a word trigger where the player asks a mob for your item and the mob creates one and hands it over.
There's a bit of a learning curve but the TBA mud is a lot of fun to work with.