Here is a link to the current trade exceptions and expiring dates.
http://www.basketballinsiders.com/current-nba-trade-exceptions/
Interesting note came out today about Hornets and Spurs interest in trading up in the draft. Charlotte for example holds 2 expiring trade exceptions totaling 1.2m which expire on 6/25. Spurs want to trade up from 29, Hornets want to trade up from 22.
Might a deal where we receive a veteran leader such as David West or Kevin Martin + 1.2m trade exception in return for pick 16 work?
Boston receives: Kevin Martin or David West, 1.2m trade exception
San Antonio receives: Pick #22 from Hornets
Charlotte receives: Pick #16 from Boston
No. Trade exceptions don't work like that.
Trade exceptions are created when a team sends out more salary than they bring in in a trade, and cannot be transferred or traded to another team. The purpose of the trade exception is to absorb a salary smaller than the amount of the TPE without sending salary out (like when we took in Marcus Thornton with the big TPE from the KG/Pierce trade). And two small trade exceptions aren't the same as one bigger one - you can't combine their amount to absorb a bigger salary
Also, given that we'll be under the cap again this summer, trade exceptions aren't useful. They have a cap hold, which would decrease our amount of cap space unless renounced, and we can just absorb salaries into our cap space without a trade exception, Even if such a trade were possible, it wouldn't make sense for us