I thought of a pretty good idea (At least I think so).
Why don't they have an NPC that will buy weapons, armor, mats, etc... for a set price from players. Then keep track of how many it has bought, and sell them to players looking for that item (if it has any). That way its still fair cash for players crafting / farming wanting to sell their mats, and players will be able to find the items that they need. The set prices will keep RMT people, and greedy players from jacking up the prices on things just because they want money.
Also have the NPC put like a 100% increase on the items it buys (example: NPC will buy a dodoskin for 300g and sell it for 600g). Which will allow the bazaar system to still exist for people who want to make more than the NPC offers, and sell items for less than the NPC does (example: set the dodoskin price to 500 in their bazaar). So people who like searching through every bazaar (ARG...) will be happy, and get a lower price for the item by searching through bazaars (reward for effort), and people that hate doing it will be have somewhere to buy / sell stuff.
This would be a very functional, UNIQUE, market system that will keep people on both ends of the argument happy, and keep RMT people from jacking up prices.
If you guys want to add anything to my idea, or critisize it please feel free by adding to this thread. I am gonna also try and find a way to suggest this to SE (Good Luck... lol).