Price check, AR Upper

I've got an acquaintance looking to sell an upper and we are trying to figure out what it may be worth. I was hoping to get some opinions from the folks here.



DSA Inc M4 style flat top upper
M4 profile 16" 1:9 barrel
YHM quad rail
YHM flip up front sight/gas block
A2 flash hider
RRA chrome BCG and standard charging handle
About 500 rounds fired
Scope not included

Thanks for any opinions. I was going to tell him to ask $500 and have some wiggle room.

 

New your looking at 650 to 700, used I would say 450 to 500. Is the barrel chrome lined? If so we charge 50 bucks for chrome lining so thats another 30 used I would say.