If the civ you want to trade with already has the resource/luxury, they aren't interested in buying it from you, so the option to sell to them does not appear. This is not a bug. You can only trade something that you have, that the other guy does not have.
- Sirian
- Sirian
~TF
I mean, I was already waiting 3+ minutes between turns, now it's up to 6, and I'm only just beginning the industrial age and have 7 civs on a huge map. I would hate to see the game at 2000 AD with 16 civs!