My used books aren’t showing up?

I’m just trying to sell a few books that I’ve had laying around the house. It looks like I’ve added them correctly, but when I visit the main page for the book, my listings don’t show up in the “See All Buying Options” or “Other used from $xx.xx” lists.

I got my account set up, got approved to sell books, and listed the first two by finding them in Amazon’s catalog. Both listings now show up on my Manage Inventory page as Active listings, with 1 of each available. The prices for each are lower than any other offers available on the book pages right now. If I click the link in the Product Details column of the inventory page, the book page opens up, but my listing isn’t there. I can see one used offer for one of the books, and multiple used offers for the other book, but my listings are not showing up.

Can anyone shed any light on this? Did I miss a step?