Alot of people don't seem to understand that making money by selling things on the Market Board is not Gil generation. There is no money being generated there, there's actually money being taken out of the economy because of the taxes. People are seeing that the gil sinks are currently much greater than the gil that can be generated by a level 50 character. Eventually the gil will run out, it doesn't matter how many belts you put on the market board.

I saw someone in an earlier thread suggest mobs in dungeons have a chance of dropping Allagen pieces. I feel like that would be the strongest play, without taking things too far.