as many mats as the sum of individual pieces. To include the massive cost of gold and skill points to acquire the recipe. This is definitely a bug or a sick joke, but warrants a look.
As of now with Trading Post prices (raw mats) because of the extra mats:
272.27 silver to craft a Box/Bag/Satchel
171.33 silver to craft the 6 pieces + insignias.
Won’t get into the recipe costs as it’s a spoiler. But for the effort of investment and the lack of reward it’s far from worth it.