I've spoken about this before, but I personally do not believe that Lord of the Craft's economy is currently stable enough to support the idea of removing the auction house. This is going to cripple the global economy as it'll only serve the purpose of limiting the opportunity to generate liquidity and create supply bottlenecks within the economy which will definitely impact the value of the mina. Currently the only instance in which additional money gets injected into the money supply is through voting alone. In prior years there was a very functional and well thought-out plugin which enabled people to become traders and deliver supplies via llamas across the map to NPCs for pocket change, this - in combination with voting - allowed for players to have multiple opportunities to acquire minas, this helped smooth out the economy as it meant that there was another means of increasing the money supply aside from voting. Maintaining liquidity is essential to creating a strong economy, the fact that the only way the money supply is increased is through voting impacts liquidity among other things - limiting the auction house is going to have a similar effect.
Believe it or not but I'm actually a big advocate of things such as removing the auction house, but LOTC in its current state is NOT going to be capable of handling such a removal unless we create more opportunity for players to be able to gain minas/compensate for the lack of liquidity. The removal of the auction house will likely mean that the rich will get richer (due to being able to fall back on taxes) and the poor will get poorer (due to not having a convenient way to sell their goods, nor acquire convenient minas to be able to buy goods from others).
I'm part of the economy team for a separate server, while I'm definitely not the brightest person on that team - nor the most technically minded - I feel like I can confidently say that this is a bad idea.