hmm...its up to you, but personally, i would ID this (it could end up having a great damage mod that doubles the price, or it could end up being crap and halves the price) but either way you wont get much for it unid..
check the stickies. don't Id it, yes chances are it good be 15^50 yes but falchions with 15^50 don't get a whole lot and that is a small chance I would sell unid or id and rely on it having good, salvageable mods