Presti is the best GM in the business.
He trades Harden and some scrubs for Martin's expiring contract, Lamb who could really be the next big deal plus he gets the Raptors lottery-guaranteed pick (Meaning that they only get the pick if it's a lottery pick) as well as the Mavs 1st round pick which will probably be in the lottery as well, depending on what Dirk has left in the tank.