As you may or may not know- the matrix online has a market place - which is more or less a joke.
We have people selling health pill 1.0's for hundreds of millions which won't ever sell - and more crap in the way of the good stuff then one can shake a stick at.
The marketplace needs an overhall - more organization to it - level catgeroies - a better system for buying and selling items - or just finding them in the first place.
Alot of the problems on the market place could be fixed with an expiration timer on them. I hate to compare WoW and MxO but quite frankly WoW's auction hosue system is an invaluable resource to the game, the marketplace is a joke - people only farm when they need bits, people mission if they want money - a big issue of this game is the dependance upon missions for everything but moving past that - the market place could be a very valuable tool if it was revamped and done properly.
- more precise searching parameters
- notifications of sales
- bidding is always an option - as opposed to spamming the boards
- expirations of un-sold goods
- (possiblity) *cough* LE Char sales - ghost wants to sell a gun or perhaps anome a vial - just a thought - rare disguises - thats right im a dreamer and dane cook said "dream it ya' *CENSORED* dreamers." - so 
- perhaps a search bar (i don't think wow can claim ownership to an in game spider.)
Just a thought or two - i'd like to see something come from it - cause no part of me wants to spend 10 million on one red frag.... you know what that brings up to - boost the freaking red frag drops.
I killed about 60 white security guards today - to yield just one clothing sub routine - what the hell is that!?!?!? I had an easier time getting 01 berets then the red frags i need.
Darminian

