Hi there,
as my alts which store all my crafting materials due to lack of bank space (I'm slowly upgrading my bank though) filled up (although >110 bag space) I took all the crafting materials I had more than enough of and started crafting.
Comparing the price a stack of 200 raw materials will sell for at the vendors (800 gold) with the gold you get by selling crafted items, none of the tailored items does make a profit (up to VR4-6 items). One raw-material is equal to 4 gold, crafting f.e. a VR4 robe requires 13 ironsilk which adds up to 52 gold of raw materials if sold directly to the vendor, though the robe only sells for 46 gold which makes a loss of 6 gold. VR4 shoes require 11 raw materials (11x4 = 44 gold) but sell for 23 gold only - loss of 21 gold!
With smithing and woodworking especially 2h weapons do grant a profit (some items just a small one, but they do), but I'm currently considering just selling the raw-materials needed for tailoring directly to the vendor (at least this grants more gold than crafting any of the items). I know I can offer/sell these materials at the guild store but I was not able to sell raw materials their either (maybe need to change trading guilds I'm in). Besides that, crafting isn't really needed to push a profession to max-level as the deconstruction of white items you can pick up by running through the leveling zones is more than enough - maybe that's why I'm not able to sell these at the guild store.
Is this system really intended that way? I do not have problems making gold (at least of now while I'm still leveling), but crafting seems to be a bit out-of-place IMHO.