I just bought a sealed copy of Darkwing Duck for GameBoy at a, what I think, is a decent price ($25). I snatched it quickly before anybody else could, mostly based on the fact that despite me being a somewhat recent GameBoy collector I don't ever remember seeing a mint copy of it in the past.

So, GameBoy collectors, is it a good buy? How rare is it? Will I be able to at least double my money if after playing it on an emulator I decide I don't like it and want to sell it still factory sealed? Thanks for the help!