Long Cruise, Low Price
Some of the best deals in cruising are re-positioning cruises, where a ship moves from one part of the world to another as seasons change. For example, next April you can sail from Florida to Barcelona on Royal Caribbean's Rhapsody of the Seas for as low as $799 per person. The price includes two nights at a hotel in Barcelona and 14 nights at sea. However, it does not include taxes and air fare back from Europe.
This particular deal is from Travelzoo http://www.travelzoo.com, but a number of other re-positioning cruises are available at Vacations To Go http://www.vacationstogo.com and from individual cruise lines or travel agents who specialise in cruises.
The picture above is of the cruiser Aurora, permanently docked in St. Petersburg, Russia. A shot from this ship indicated the start of the Bolshevik Revolution in 1917.