LOL, I am playing last night and I see a rival faction's constructor bearing down on an extremely rare triangle of Durantium. He is about 3 hexes away and I am about 10.
I figure I will buy the constructor at any price since those 3 nicely arranged Durantium spots are the high point of the game so far. Long story short, I finally get an agreement to sell me the constructor, for all 9 of my star bases and my home planet. Naturally, I just flipped him off and went home. Shortly after he captured one of the Durantium. Shortly after that I got the other two. The hard-headed sob wasn't smart enough to pick off all 3.
I know Brad fixed the AI so it wouldn't sell it's ships for cheap, but I think he over-did it. I would have grossly overpaid for the damn constructor and the ai wasn't smart enough to take advantage. 