Create a 'fee' to post an item, and a smaller fee to 'adjust' prices already listed in the market. This would be the ideal solution.

My argument for the 'fee' suggested is to achieve a more streamline price range. Currently, there are major players who stand by the market to undercut any and everything by 1g or 10g - which doesn't create competitive pricing, however will create a sale. The 'fee' system will force players to think competitively ahead of time and price competitively to make a sale, therefore enforcing competitive prices.

For those who say "this is how free markets work" and offers no solution - 'claps' to you for your ignorance in failing to understand the root of the problem, however I've not the time to enlighten you on your narrow minds.