Here's a (somewhat) complete list of what items are worth picking up:

Weapons

Eth 6-socket (and unsocketed) Berserker Axe
Eth 6-socket (and unsocketed) Colossus Blade
Eth 6-socket (and unsocketed) War Spike
Eth 6-socket (and unsocketed) War Pike
Eth 6-socket (and unsocketed) Thunder Maul
Eth 6-socket (and unsocketed) Giant Thresher (Haven't seen demand for this one, but it may rise)
Eth 6-socket (and unsocketed) Ghost Spear
6 socket Superior Hydra Bow
6 socket Superior Crusader Bow
5 socket Berserker Axe


Armor

3 and 4 socket Archon Plate
3 and 4 socket Dusk Shroud
3 and 4 socket Sacred Armor


Paladin Shields

Eth 4-socket (and unsocketed) Vortex Shield
Eth 4-socket (and unsocketed) Kurast Shield
Eth 4-socket (and unsocketed) Zakarum Shield (Maybe, smite damage isn't so hot...)