Assembly Hall

What problem will this fix

Who will it help and how?

Well, that would be your choice, which is important to have. Oddly enough, I disagree with your sentiment. I think if people knew who they were buying from, they would likely be a bit more selective about their purchases. Maybe you'll be more likely to purchase a product from a corp member over someone you don't know. Or maybe you'll refuse to buy a cheaper product from someone you don't like because you're on opposite sides of the war, or you just think he's a d***.

Now, you need that first part, in order to effectively do the second. As a station owner you should have quite a few tools available for dealing with various internal issues. Having the ability to ban pilots from either buying or selling (or both) in the local market would allow a station owner to have more direct control over what is available to the people wants. It is all about choice, and tools to make those choices.

You can't choose who you buy from. You can only choose how much you pay, the order with the lowest sell price is always sold first, regardless of the price you choose to pay.

If your idea went ahead, the only way to avoid buying stuff from the person with the lowest listed price would be to go and buy from a different station.

Unless you're proposing a change to the market that goes significantly beyond 'show who each order belongs to' the only way to be selective is to go to another station, or not buy something.

To be clear: It is not possible to select which order to interact with. you always buy from the lowest sell, regardless of which you select, and how much isk you put in.

Given the RMT potential of "fixing" it, no.

Why not?

Two reasons - the simplest is because it would make it far to easy to (try to) disguise RMT as legitamate market activity, making it that much harder for CCP to hunt down. Now, if you want to use the market to help run your RMT operation you have to go to out of the way stations without much traffic, and that makes it easier for CCP to find.

Second reason is because that's just not how the Eve market works. It's not a store where you go in, look around, and if you don't like the product, the price or the owner, you go to a different store. It helps to think of the Eve market as a commodities brokerage (because that's what it is). Sellers indicate what goods they have and the lowest price they will accept for them. Buyers indicate what goods they want and the price they are willing to pay. The market service, acting as a broker, matches orders on a lowest price out per station system. If two orders have the same price, the oldest order wins (iirc).

The system doesn't need to be changed because, frankly, there's no compelling reason to do so. It works, and by working the way it does it helps limit RMT potential.