Well, I found out today to my dismay the Miniature Market, the website from which the majority of my W@S minis originally came from, has no War at Sea products (ships) left besides those from the 2010 base set. Sad day.
They buy collections as people sell them. But WAS ships are still popular to a lot of folk despite 3D printing, and the market is slowly drying up as people hoard them.