Decrease Time on Vendor Recipe Respawn

Want to see if it's possible to increase the frequency at which recipes at vendors are respawned. Not a stranger to the fact that people will take advantage of/abuse camping recipes to repost on AH for ridiculous markups, but the server population should really justify increasing how quickly the recipes become available. This is along the same lines as the pleas from miners to increase frequency/amount of deposits/veins, but in this case it's even more annoying given that theres often just 1 recipe available and whoever has the timer just sits on it. I don't really care if the same continues to happen, but I figure more supply should drive the AH prices down, or at the least make the recipes available in general. Specifically, the god damn stam to shield recipe. WTB.