I picked up one in March from Harrah's KC for NCL. Had to book by Mid May, there were several cruises available, but none worked for my schedule and when I asked about upgrading to a balcony the cost was too much.

I received another offer this month to pick one up on Sept 14th, but after not being able to use the last one, it's not worth me buying airfare to go pick it up, if it was within driving distance I would definitely pick it up and see if the dates would work this time.