As a 70-71 Drk I can say that this sword is a little expensive but its still a good sword.
the Dmg is high and Acc is always nice. Balmung May have Dispel Effect but this sword has higher Dmg. Balin sword is almost as much Dmg but has no Acc and is very cheap, therefore you could have a Balin and afford this as well maybey.
I already know a 75 Drk who has this in my LS and i know theres at least 2 others on my server.
It's my opinion the sword would sell, cuz its a good sword and also for the looks. Even though its Expensive.
In terms of stats, this sword is NOT worth the trouble to get. I would take a Balin's Sword over this any day. The ONLY reason to buy or craft one of these is to show off, and please... dont do that... it tends to **** people off.
Is there any reason that a dark knight would use this sword over Balmungs? I'd love to make one but, with the price being around 4.3M just in materials I don't see anyone buying this sword.