Harry Potter / Gregory Goyle, Slytherin Robes

This Harry Potter minifigure is desirable for collectors due to its unique dual-sided head, representing both Harry Potter and Gregory Goyle after the Polyjuice Potion transformation. The inclusion of the Slytherin robes with the dark green trim and striped tie adds to the figure's appeal, accurately depicting the character's disguise in the 'Chamber of Secrets' storyline.

The minifigure's specific context within the 'Polyjuice Potion Mistake' set also makes it a notable piece for fans of the Harry Potter series. Collectors often seek minifigures that represent key scenes or plot points from the books and films, making this a sought-after addition to their collections. Condition is always important, with figures in pristine condition commanding higher prices.

This minifigure appears exclusively in one retired set, 76386-1 Hogwarts: Polyjuice Potion Mistake. While not a limited edition or promotional item, its single set appearance contributes to its relative scarcity on the aftermarket, especially as the set has been retired. The production run was limited to the set's availability, making it less common than minifigures appearing in multiple sets or those that were produced over several years.

Given its single set appearance and the enduring popularity of the Harry Potter theme, this minifigure has good investment potential. As the set has retired, the minifigure's value is expected to gradually increase, particularly for figures in excellent condition with all accessories. The demand for Harry Potter collectibles remains strong, making this a potentially valuable addition to a LEGO investment portfolio. Comparing it to other single-appearance Harry Potter minifigures will give a good idea of its value trajectory.