PC on a Gold Shadow Blade & Gold Gladius

Just need to know whether these are sellable or not.
I believe both are rare skins, but I'm not sure. Both are gold.

Shocking Shadow Blade of Swordsmanship
Lightning damage 15-22 (requires 10 swordsmanship)
Damage +15%
Armor -10 (while attacking)
Swordsmanship +1 (20%)

Icy Gladius of Swordsmanship
Found in an Elona chest. Elonian style?
Cold damage 15-22 (requires 9 swordsmanship)
Swordsmanship +1 (20%)
Inscription: "Strength and Honor"
Damage +15% (while health is above 50%)

Also, how much would each sword be worth if I replaced them with perfect sundering and fortitude? Would it be worth the trouble?

Thanks in advance.

Don't add mods, you won't raise the value by more than what the mods are worth.

As for the items, need some more info- what is the damage mod on the shadow blade and which skin is the gladius, elonian or tyrian style?

Edit this info into your post please

Sorry 'bout that. ><
Required info added.

1. 10-15k. I've really struggled to sell any -10ar or -5e items for decent prices lately
2. might get 20-30k. But you can still get the Tyrian Gladius skin from Elonian chests. If it is the Tyrian skin it would be worth closer to 5k.