Well, for me, my crafting, since I am not really getting any extra materials from any other source than myself, pretty much everything I get, I refine and deconstruct. I do sell stuff with ornate on it, but I pretty much break everything down for the materials I need such as jute, ores, and wood. I also break down everything I make usually, even though it is said it is not proficient to gain inspiration from breaking your own stuff down, I do find that it allows me to get the most out of the mats I have farmed or bought, and it allows me to save some money on the racial ingredient on the off chance I get that back.
That being said, I will gladly make something for other guildies, but with what seems like alot of crafters, no one seems to be asking for items partially because they already have a tight group of friends that are crafting, or as someone said, gear is abundant. The only real trade I have done is as a swap of items with specific traits, as I crafted a lvl 1 item with a trait and they in turn sent me back something else for traits.
Considering that the only crafting mats really seen in the guild bank is provisioning mats, and the few other crafting mats I see are only in the guild store, I honestly can not afford to put stuff up when I am barely getting enough materials to craft with yet alone improve the items beyond white to make it worthwhile for anyone to buy.
At end game, I will probably end up putting items up in the guild store that is crafted, mostly because by that time I should be able to find materials to be able to put up something worthwhile, but considering the number of Improvement items needed to guarantee a 100% successrate right now is steep without the skill points to reduce that, the cost isn't worth it at this time. After all, with no skill it takes 5 green improvement items to get a green, 7 blue items to get a blue, and probably 10 of the purple material to get one to purple and like probably a bunch more of the lengedary items.
The game is new, so give it time, after a good solid month you will probably see these crafted items up, and more people willing investing in those items for their twinks and alts once their main has pockets flowing with gold.