THE ISSUE
So for those of you that are not yet aware, you can use ‘custom bid’ to purchase items for less than the going rate, and then sell them back at the going rate. This is for the most part, risk free, assuming you don’t log out with purchases pending before going to bed, and increases your total assets by a percentage ammount.
Before you claim this is an exploit, it is providing a service – players that want instaneous purchases or sales rely on this type of trader. In addition Arena Net took down the trading post to look at just such things as this and did not make any change..
In any case, the issue here isn’t the exponential growth of one’s assets – although it is a part of it. The issue is that this form of trading is the best method of making money via trading. Crafting gear provides subpar returns and runs the extreme risk that people will continue to underbid your item by 1 copper and it will never be sold.
THE SOLUTION
There are however one of three fixes that I would like to propose:
The first proposes a removal of custom bidding, and all player control from the economy. Instead items are provided a value with both a ceiling and a floor, that should be obtainable with the current market data. Sales exceeding demand reduce the value of this commodity, while purchases exeeding supply increase its value. The economy would become a living organism, rather than a manipulated enterprise, and exponential growth based on assets would be curbed.
The second proposes an enforced 10% reduction on all sales lower than the going rate. That is to say if you post an item for 2.6 gold, that next person would either have to post it at 2.6 gold or 2.34gold. The market for items that are usuable by the community (other than consumables) will undoubtedly see an increase in supply, as the risk of being indefinately undercut would no longer be present.
The third would be to offer a range of prices on all sales, where the product is sold for the highest of any available range, and only the highest value is made puplic. To explain, if an item is put up for bid at 2.2 gold to 2.6 gold the player base will see an item available at 2.6 gold. If a second person puts an item up for 2.3 gold to 2.5 gold, the original poster’s item sale price will drop to 2.5 and the player base will see two items for 2.5 gold. If someone then puts that same item up for 2 gold to 2.2 gold, the original posters sale price will drop to 2.2 gold and the second posters item will return to it’s original maximum value. The player base will see 2 items for 2.2 gold and one item for 2.5. This might slow down sales a little though, and if possible I would recommend only offering a range to end products.

