I solo in PoN all the time, and these are never 51. The Ravenous Nightstalkers are allways 51, and those are LB to me at 57. Furthermore, these can be over level 55, because some cannot be charmed with Boltran's and that charms mobs up to 55.
I suspect these are always 52+ and maybe even 53+. I'll know more when I decide to level (under the new AA system, it seems like it makes sense to grind the AAs early, when they come easier and level when necessary to get more AAs.....assuming you have no pressing need to hit max level ASAP).
Edited, Dec 21st 2006 1:02am by Illanea

Blood Encrusted Feather
Blood Raven Parts
Concentrated Grade A Choresine Sample
Consigned Bite of the Shissar IX
Decaying Bone Idol
Meager Fear Shard
Metal Linked Crown
Natural Silk
Rubicite Ore
Silken Tail Feather
Sunshard Pebble
Twisted Talon