FYI, my dry docks filled with the 'Renard' Chasse-Maree (http://www.potbswiki.com/index.php?title=%27Renard%27_Chasse-Maree). These are by no means a great ship, but it has 140 capacity and I've bought all of mine for less than 2k db. One for as cheap as 1650. They are part of the quest reward for the Economy Tutorial. At the price and size, they make great 'floating warehouses' for 1-20 lvl players.