It is my understanding you can in fact trade a trade exception. It has no cash value according to the CBA, just like a draft pick or a players rights. What a trade exception allows you to do is to recieve a contract without sending back an equivalent value in contracts (within 25% +/- $100,000), assuming you are over the Cap (note Cap << luxury tax limit). Therefore you could send the TE to Denver for nothing, and they then choose not to match an offer to JR Smith. This would leave Denver with a 1.8 million TE to use as they chose (and it might even reset the expiry date on the TE) while picking up players. When they say you can't combine a TE and a player, what they mean is that you can't take that 1.8 million TE and Bonner (3 million per year), and package them to take back a player with a contract worth 4.8 million....