In the old wilderness (which is returning), items that were dropped on death simply switched hands the majority of the time. In the current pvp, upon death, all but one items is lost/all items are lost, dependent on the pvp world. This means that less of these items will be leaving the game, so less demand than currently. There is potential that bosses and new pking accounts could slightly offset this, but basically everyone who needs claws has them, and others who merchant them don't want to be stuck with them when free trade returns. This is generally why most boss/pk items have been nosediving. Dependent on how long until the free trade/pvp update, we will likely hit a point where these items are bought back up for an easy price flip, and then a continual fall. In the current economy it's best to buy items that you need and disregard the price, unless of course you are flipping or manipulating them, then that's your own agenda in terms of selling time. Dragon claws will not likely hit the price they once were, based on an opinion totally disregarding all future updates, because as with always a small update can change the market drastically.