I have seen them at bid4vacations.com and egghead.com type in cruises & search all. Watch the fine print. Most are for Ren & Norweign but Carnival is on the list. egghead.com charges A LOT for "shipping" if the cruise final bid is really low & I think its per person. bid4vacations charges one flat rate for the cabin but you have to pay port charges & taxes for 2 people. They seem a little better. Still read all the fine print for each cruise by scrolling down before placing any bid.