what are item main, that it should go in a menu of website of shopping?

I made a website simple this is a example for I add in the website official what are elements more important in un menu from a website of a shopping for that a visitor can buy easy?

I added:

• !Hello visitor (message for a new visitor)
• login (for access to a account)
• create a account (for create a account)
• Ofert of day!
• sell
• help and contact

I would like add more element but I think they will going to be bother to the users

What option is best for a website style shopping o what structure is best?

My client ask me a web site Ebay style.

I am not a expert in design I need a tips/recommend of a expert in design