Several ranks of "remove hot flag" perk. Only useless items being able to sell at first. With one rank you get to sell silverware. With another, some family heirlooms that are engraved so you're now able to remove the engraving.
Perks that enables you to evaluate a target and see what much worth he is. Like being able to separate a duke from a commoner.
Reverse pickpocketing and have him arrested. Nice way to get rid of someone without resorting to killing