Seen a lot of noobs placing incorrect durability for exchange apps (shoutout to special noobs that make anonymous apps, also with incorrect durability, for solid price... thus rendering me and everyone else unable to fill the app or even contact the creator of that app).
So:
Cuisses, Cuirass, Weapons, Boots & Shirts from DH chess have 34/34 durability.
Pauldrons and bracers from DH chess have 37/37 durability.
Helmets from DH chess have 40/40 durability.