Actually, I'm skilling up on these as a level 72 clothcrafter and 34 smither. It's so far gotten my smithing to 36 and clothcraft to 74, its just an alternitive to Rainbow Thread, since spider webs arent usually in stock on my server. I have only made 2 complete stacks of 99, not sure how much they sell or but on my server its around 7k/per synth...not bad to get to 77, even if you do break, its two birds in one stone, smithing AND clothcraft.
some people said equip in range will be returned. equip in ammo will be one time. But this one shows equip in range, but it looks like a one time use item to me.
Originally I got very excited over this item seeing as how a red mage can equip it. I thought to myself 'oh what a great way to lvl my throwing ability!' Unfortunately I was unable to purchase one due to a lack of 'financial resources'
Please correct me if Im wrong but I believe that in Jeuno I saw this being sold in the item queue as singles and as stacks of 99. This would lead me to believe that it does not return to you because no one would want to buy 99 boomerangs, for example. Along with the ammo slot thing I would say this is unfortunately a one time use item (and an expensive one at that)