If you check the Gameforge wiki is not up to date since what? 2 years? The wiki is functional on the servers where the players help, our wiki is done entirely by the team, mostly by Tary. When you open the client there is a button for the wiki so i doubt players don't know about its existence. If the players are willing to help we can create accounts to fill up the details in the wiki, otherwise we are simply too busy with other things to do it in resonable times (and since new things are coming the amount of infos on the wiki can only grow)
As for the average price feature i am not a fan of it due to the fact that you can exploit it easily. It works ok for common items, but for rare items a player could simply buy his own items 2000 times and change the price as he want, the average price will change immediately, fooling everyone. Our shop search order the price from the cheapest to the most expensive, so if you cannot find any cheap price it means there isn't one.
I understand that the wiki is entirely done by the team but if I could help in any way in updating the wiki I will, happily. Waiting for further reply