Diablo 3 Org Gaming Group

[TinCow]

However, the secondary crafting component -- the teeth -- are hard to come by (about 10% of breakdowns) so for unique items the wanton crafting can be a little more costly.

Maybe things are different in hardcore, but in softcore I'm pretty sure you get a secondary component when you recycle a rare item 100% of the time. So, recycle poor rares to craft new ones. Sell good rares on the auction house (or save them for use by another character).