Only items that are available can be put into the active area of a remote shopping cart. Unavailable items can be put in the SaveForLater area of the cart.

Amazon defines available items as those that are:

The availability of an item can change without notice. Putting an item in a cart does not reserve it. Items in carts can become unavailable and their prices can change as soon as the item goes into the cart.

Determining if an item is available is determined differently for merchants and sellers.

With Merchants, you use one of the Offer response groups to determining item availability. Seller related operations, including SellerListingLookup and SellerListingSearch, cannot use any of the Offer response groups.

	Note
	Make sure, in a SellerListingLookup request, that the value for <Status> is "open."