It would be an interesting addition if there were a way to purchase ships from the shop. As in, if you're at a shop, you could pay a certain amount of credits, and be provided with a ship. In order to keep things balanced, it could be limited to certain ships, for example you could only get Isanths or other blueprints that come in the game. I would suggest it costing as much as buying each block, plus some. Maybe, the price of the block then another credit for every block in the ship. (Including docked entities.)