Eth weapons don't lose durability on Mercs.

Also, that's kinda a crappy sword isn't it?

One-Hand Damage: (40-51) To (202-255) (121-153 Avg)
Two-Hand Damage: (148-187) To (318-401) (233-294 Avg)
Required Level: 71
Required Strength: 185
Required Dexterity: 87
Base Weapon Speed: [0]
+170-240% Enhanced Damage (varies)
Adds 233-482 Fire Damage
+3 To Fire Skills
+15 To Inferno*
+10-20 To Strength (varies)
+5-10 To Vitality (varies)
12% Chance To Cast Level 16 Firestorm On Striking
Fire Absorb 20-30% (varies)
(Only Spawns In Patch 1.10 or later)

The damage isn't that high compared to other swords with high %ed. Fire damage is pretty decent, but it has to get through fire resistance. +3 Fire Skills is only good for classes that have fire skills which are... Sorceress, Amazon, Druid? The only thing I see on it that really makes it better than a high %ed cruel is the Fire Absorb. I'd trade it.

Still, nice find.

What is it they say about silence being golden?