Salvage it? are you kidding? The only useless thing on those daggers are the mods themselves. The armor +7 is pretty common. The deep wound thing might not be as common, but is fairly build dependant. The stock dagger is worth more due to the req 8 and 15>50. Find some popular dagger mods and replace the old ones with them, boom you have a set of uber gold oni daggers to get more money out of. Or you could just sell it for the 15>50 thing and let the buyer replace the mods himself.
Actually now that I think about it, how often is an assassin's health >50%....... let alone not dead
