Mega Man 4 Game Boy value

The catalog shows that Mega Man 4 for Game Boy has a used value of $1575. For comparison, the other titles listed have significantly lower used values: *Mega Man Zero 4* is valued at $98.57, *Mega Man Battle Network 4 Red Sun* is $82.68, and *Mega Man Battle Network 4 Blue Moon* is $67.01. The high value of *Mega Man 4* suggests that the specific Game Boy version is highly sought after compared to the Game Boy Advance titles in this set.