Trade system, buy and sell

I, personally think they should set up a shop or trade system, where users can sell/buy/trade to and from each other, I don't know if this has already been mentioned but I seriously think this would make some people happy and make some peoples life easier!

What do you guys think?

As I said to the numerous topics that have been posted which are similar to this: it will cause problems for players. Not to mention because of this, more hackers will be willing to spend time to hack the other players and this will mean Haypi needing extra security, which isn't really cheap.

For the players, it will cause massive out-roar, I think.

Auction House would be ok with reversed price.
Lets say an item costs 1000 silver and then it begins to
go down every mins or 5 mins down to at least 0 silver.

Auctions won't be fair as well since I'm guessing that the items they will be auctioning will be pretty good ones. Only those who can afford it will always get them. I understand that paying money should give you an advantage but the richest person will always get them. I just don't see how that can possibly be a good thing.

I agree with the shop / trade system