Ok, I stumbled on this glitch totally by accident. In a game I started recently (2.02) as the Terran Alliance the Thalans beat me to Xiathiam Hull Plating(spelling). Well I went to trade with them, And I noticed something strange. I can get them to trade a massive amount for almost nothing by adding the Xiathiam Hull Plating to trade window last. To give an example I offered an Economic Threaty and I got 1707BC(all their money), 4Million Influence points, Economic Treaty, Reaserch Treaty, 6 techs, about 10 really amazing planets (including two that are PQ 20+), and Xiathiam Hull Plating...an amzing deal no? Normally they wouldn't accept this, but If I add Xiathiam Hull Plating last the offer goes green, which doesn't make sence. I can send my save game in for you guys to look at. As I said, I am playing as the Terran Alliance, I just made contact with the Thalans. They were at war with Korx and then the Korx surrendered to me. I had known the Thalans Had Xiathiam Hull Plating, but hadn't made contact with them yet, so I went to trade with them and noticed this. I don't know if this glitch is Isolated, and only works in the specific situation of my game, or is all AI's respond this way.