Salvage... they are extremely hard to sell. I've been trying to get 15k or so for req 9 +5 energy for a month now. 20v50 isn't exactly the most desirable mod.
+5 energy is way different then a 20% below 50hp. And i know people carry around 15%^50 and one for below 50HP if there health does go under 50%. Energy only adds energy while my bow is 20% extra damage but below 50% health. So i think it is ALOT better then a +5 energy bow..
No, I don't know of any rangers that actually use 20 below, and TONS that use +5 energy. They are MANY builds and uses for a +5 energy, while 20 below is junk unless you have a lousy monk.
I agree with StueyG. I would try to salvage the Fortitude and Sundering mods ... if you ever run into a rare gold bow from a high-end or elite mission region, then those mods on those items might actually be worth something. Of course, you also have to consider the inherent mod if it's a non-NF weapon. (For NF weapons, you could always slap an inscription on it to perfect it).