PC on req9 gold fellblade

Crippling Fellblade of Swordsmanship
Gold 15-22 (req9)
Lengthens Cripple Duration (33%)
Swordsmanship +1 (20%)
Strength and Honor (Damage +15 while health above 50%)

Would it be worth it to upgrade it to 20/20, +30 or sell as it?

Sell as it is
Was around 70-100k last time i knew it, but not sure if that price still stays now.

I've seen couple spammed for 60k-70k~ in past couple of days but might still get around 80k~ with a bit of luck.