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The MLB trade market is the perfect place for general managers to shop when they're looking for those difficult-to-find items.

At the top of that list are shortstops, aces and power hitters. This offseason, Elvis Andrus, Johnny Cueto and Yoenis Cespedes are some of the big names who fall into those categories. Of course, those aren't the only types of players that will hit the trade block.

Some teams will be looking to sell high on breakout stars from the 2014 seasons. Others will be attempting to part ways with underachievers who aren't living up to the terms of their deals. Plus, there are some trade candidates who just need a change of scenery.