Aloha all
The barbed ringmail legs drops off Mr. Bled, and generally required a good level 60 group to get into the castle area to pull and kill.
The barbed ring tunic drops off several of the mobs in velks, but it is most commonly dropped off of Upper Dogs named mob Tpos Icepaw.
Since Upper deck was considered by some to be the best non-AoE exp pre-Luclin and Pre-PoP, there are a lot of the BPs floating around ( I think I have like 5 or so ...) However, since it required a much better group to go deeper, the legs were less often camped. and once gotton, are kept by the chain class people until they complete their Velious quest armours.
Hope that explains why the legs cost more (on drinal about 7k -- BPs are selling for 2500 ish)