In Wrath of the Lich King it is item level 264, requires level 80 and sells to vendors for 17g 97s 50c. In MoP Classic it is item level 264, requires level 80 and sells to vendors for 17g 97s 51c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Blade-Scored Carapace Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Blade-Scored Carapace suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Blade-Scored Carapace is part of the transmog set Scourgelord's Plate (Death Knight only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Blade-Scored Carapace Fits
Other Items Named Blade-Scored Carapace
1 other item in the current build is also called Blade-Scored Carapace. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 51902 (51897 to 51907) were usually added in the same batch as Blade-Scored Carapace: the same quest line, zone, vendor or reward set.