PC on a variety of interesting items

Could an experienced player take the time to give me an idea of what these items are worth?

#2 = Salvage for +7 elemental mod
#4 = 1k
#7 = 1-3k but will be hard due to req just merchant it
Fellblade = Merchant
#10 = too high req so merchant
#13 = 10k

~Herb