How do I list/relist with a fixed price or best offer?

[bozzzdad]

How do I list or relist an item with a fixed price with the option of a best offer?

[emerald40]

http://pages.ebay.com/help/sell/best-offer.html

[patches_mickey]

When I try to relist my item at Fixed Price, there is NO check box to select Best Offer.