All of the complaints I've read regarding MB volatility I have seen occur at some point in time. And frankly, I don't have a problem with any of them. A free market such as the MB will always be flexible. How flexible depends on supply and demand. Supply and demand depends on the activities of all players. You can control a market all by yourself, for better or for worse. It's your choice. But how much gil are you willing to risk to control that market? Responsibility can carry a big price tag...

Some players want a nice, stable market place where they can consistently buy what they need way under price or consistently sell their items at a ridiculous mark up. Arguments that systems like this die to inflation or that they eat themselves alive by players becoming self sufficient to avoid price gougers are wrong as the MB is always changing. So long as new players join the server, new content is released, or new recipes added the market will change, adapt and survive.