[Krakenup]

I don't trade tech with the AI. It's too easy to cheat. All you have to do is offer them everything -- everything except what you don't want to give them like your colony tech or anything you've actually researched. You can ask them for whatever you think they have that will be useful. They always accept and end up with the useless starting techs and thank you for your generosity. You can do the same thing every turn.