Just would like to present a discussion on this topic.
The only successful way to become wealthy in MapleStory is to find items of all sorts and then sell them to other players. (With the option of upgrading them to sell for bigger price).
It'd be nice if there was some bosses in the game that would drop a large amount of mesos after being defeated. Or possibly a party quest of some sort that had an array of bosses where the harder the boss, the more mesos it drops.
I don't know if I'm alone in this feeling but I always hated bossing knowing that whatever this boss dropped I'd have to take the time to sell in order to make profit. This would especially suck when I'd have to use Karma Scissors. Such a hassle.
Meh, just a thought.