Small -- only a couple hundred people. The main economic value is that they're the closest available port town to the Old City, so you have a wider range of goods available, as well as ship's captains you can negotiate with.

There's a certain amount of goods production here -- textiles, alcohol, some weaponry -- but the really big ticket items are technology, either salvaged or re-invented. What industrial base this part of the world had once is shattered now.