New Listing Format--- Help Please

[mercuriari]

I want to list an item for $100 or best offer with a listing duration of 7 days.

This used to be very simple. New format, I only see listing duration for auctions.

Fixed price tab states "Fixed price--Set a price and list it until it sells or is canceled"

There is no place to select any listing duration.

I have listed and ended my item twice in an attempt to get it right.

Also called eBay for help.

If I pick listing duration of 7 days on the auction tab it does not roll over to the fixed price tab.

Are there new listing rules along with the new format??

 If there are new instructions for the new format please give me the link.

Thank-you

Thank-you