Throughout NBA history, championship teams have been assembled by the victors of lopsided trades. Some such deals are clearly uneven when consummated, like the Los Angeles Lakers' acquisitions of Wilt Chamberlain and Kareem Abdul-Jabbar in exchange for a bunch of spare parts.
More commonly, one-sided trades appear to be beneficial for both sides when they are made. It is not until years later that it becomes apparent that one team was taken for a ride.
There are various reasons why a seemingly fair deal may end up being lopsided. Some players don't fulfill their potential, while others exceed expectations. Injuries can play a role. In some instances, a coaching change or additional personnel moves can influence the outcome of the deal.
Regardless of the reason, coming out on the wrong end of a lopsided deal can set a franchise back several years. Fans and owners of that team do not take consolation in the rationale for the trade, and the general manager responsible for the deal rarely sticks around to make another.