They shouldn't raise the max price limit. Nothing is really worth more than 10,000 gold and nothing ever should go for more than that on the official market. As we all know by now, there are very few individuals hoarding all the high priced items. One person probably has 50 chak infusions by themselves, or more! It's a free market on the trading post so idk how anet can intervene in these situations, but i think taking a hard stance on NOT RAISING THE PRICE LIMIT is in the direction of ways to go. So it should remain 10,000. Not more than that. raising it even more only encourages them to hoard because they at least have to go through the hassel of trading items for more than that through round-about means.