What is an eligible item?
A listing is eligible if:
the listing has at least one watcher,
of if a listing has been added to a buyer's cart for at least 5 days.
Eligible items must also include watchers or carts that you haven't sent an offer to recently. See official eBay Page
Eligible items to send offers for will appear in the Offers Manager's Eligible Items tab:
Click here to learn how to use the Eligible Items tab to send bulk eBay offers.