problem #1 with the wards is that they aren't global (ever try to find something useful in Grid?) and #2 you cant set your vendor to buy something you don't already have/buy more of something you are actively selling.

selling crystals is easy, selling crafting materials that you picked up in the field but have got no idea what they are for because you don't specialize in the craft that uses them ... not so easy. hell I don't even know what section to start looking in for 90% of all the crap that is cluttering up my inventories, please tell me how I'm supposed to figure that out when most of it wont even be listed unless someone else has got it dumped into their vendors.

don't get me wrong, I like the concept of the market wards and would like to see them expanded more (I.E. give us a benefit to renting a stall), but there has got to be more options when the populations are this spread out.