Well it is… at least between you, shadout and me. I do see arguments now, which I have not thought about before. Same holds for you, since you clearly didn’t know what the proposed system is about in the beginning. As far as I can tell, Shadout also seems to think, that RMT can be reduced that way, but that other problems with trading are bigger.
I want to remind you: the thread is about reducing RMT significantly, and there are at least 5 posts in here, which state „solving the RMT Problem is not possible, no matter what you say“.
But that’s wrong, because you can reduce the „pay real money and get a single item in exchange“ - Problem by magnitudes with this system:
Let’s assume, trades are only allowed, if the value of the offered items and gold of the two trade partners deviate by 20% in this System. Then you can only get a 20% discount for your real money. That means, you HAVE TO farm 80% of the item in a legit way!
So even if the same amount of people, as in other games, used 3rd party ways of RMT (which would not be the case, because RMT just does not work as „good“ as in other systems), this would already reduce the problem by 80%, because no one can play through the story with a character, farm one week and then be like „now I only need 3 endgame items to crush in PvP, which I get with RMT“. The „wrong“ accommodations of wealth and manipulation of ingame competition from RMT are reduced by 80%!
You can only get 20% discounts or buy a whole new account for money. Buying accounts can not be prevented with ingame solutions, but it is way more expensive, than buying 1-3 items, because you have to pay the leveling and other items (maybe even other chars) on that account aswell. Also, there will most likely not be a „skill system“ as in D3, but a real one, where you have to pay a prize for respeccing. This is an additional cost in that case.
To cut a long story short: the system above is not meant to solve all issues, trading has, but it can reduce RMT by a magnitude. If there are no serious problems arising from this system, then this system will be something, you definitely want in your game.