They are becoming rare, yes. Still the most unbalance ship in the game and during my tenure I was giddy with excitement when one of those ships broke server rules and came to my attention. "Another Barge gone! Yay!". I heard a rumour that the dev team did some work on it, however, and if they are more balanced I imagine more appearing on the server and the extravagant prices being charged by players becoming redundant.