Pieces of armor sets worth keeping,

LuminaLilly

My bank is cluttered with pieces of armor sets, example, gauntlets of knightmare, helm of the necromancer, etc.

Should I keep them or should I sell em or give em to other players for free (I never sell, only handouts)

BaconMagic

Sub lvl 50 gear has very little value. I might say some gear into the late 30s and 40s mighty have a bit more, but you're not gonna get more than a few levels out of it until something better comes around. if you want, give it a away or just sell it to a vendor. Green items are mostly vendor trash, some blue stuff is okay, but again the levels go by so fast if it's not veteran ranked just toss it.

Rev Rielle

Honestly, keep only the gear you're wearing currently (obviously ) and maybe one other set you're working towards. If in future you'd like anything there are plenty of guild traders about, and with a little looking you'll be able to buy what you want at fairly cheap price.

I'd also suggest doing this if you're a crafter: Don't worry about keeping equipment with specific traits, for guild traders basically have them all on hand when your research is ready.