How about the marketplace forum?
http://forum.playrohan.com/forum/forumdisplay.php?f=9
You can be more super duper specific on descrbing what are you going to buy..
Ex buying : WTB upg dagger 2.0 with 70%DD for 20k RPs only, or Trade with upg zhen 2.0. PM me here or PM me in game nick : examplenick
can describe the version of upg, describe the %DD, describe you only want to pay 20k RPs, or maybe someone willingly to trade it with your upg zhen 2.0, can also discuss it because you tell them to PM you either in here or in-game
Not limited with some parameter like what you mentioned above especially forged armor and weapon with stats.
But still your idea not a bad one, it's indeed would make it easier to trade common item but only crones maybe xD
Because character and items have so many parameters info that need deeper description.
ex : selling char or buying char, want lv 50 human, how about the stat? str ? or dex?, let's say str, how about the skills? let's say lv 6x3 for RS, Invoke, and Assault Crash. Here we go :
This assuming a person is looking/WTB(no one selling at the moment),
I would imagine they(the developer) need to make a linklist for buying char, then need to make linklist for all races(human, efl, dhan. etc), so the person who want to buy(read: looking) a human with lv range from 50, will click character link, then click human, then click link lv 50-60 because he want to buy a lv 50,
then need to make list of the stat type, str / dex / int / vit / agi / psy, so the person will continue to click the str and..
then need to make list of the skill one by one, which is lv 6 or lv 7 and(this is where the thing got stupid) imagine how many skill a class can have, and to list it one by one per class with it's lv 6/7(I don't mention lv 5 or below because it's not important) so they can choose it one by one(for their perfectly desired human that they are looking for) it's just insane.
this just to complicated at least for the dev to implement this system, and for me.
for item, there are some common item like SES, ASES that doesn't need to be described further because it doesn't have any special params, but you see there are to many items like that(minerals, acce, option stones, not to mention event items such as alphabet, snowflakes, for xmas event, etc), if they gonna implement your idea, they would need to almost recreate a new whole system with so many items need to be listed.
in my conclusion this is not helping instead making it more complicated. I would rather write what I want to buy or sell in marketplace forums(just up it again if it's sank to deep) or shouting in Montt or Limestone, also I sometimes write what I want to buy or sell in PTM, lot more convenience imo.
The one who spamming selling/looking for item is actually quiet dumb person, they should aware if there's no one PMing them after 2-3x shout, it means no one interested in their items, or nobody have that items for sale, or they have but do not want to sell it. Simple as that. Instead of keep spamming, they should wait a bit for 3 - 5 mins then try shout again. Not like spamming and flooding will help them get what they want. there's a quote, life is not instant you must work hard to reach what you want. I do hate those ppl.