If you purchased these parts new:
Rainier Arms Precision Match BCG - $130
Rainier Arms 18" Ultramatch Barrel - $320
Daniel Defense Rail - $389
Magpul PRS Stock - $210
What I'm asking for each:
Rainier Arms Precision Match BCG - $60
Rainier Arms 18" Ultramatch Barrel - $80 (the muzzle is cross threaded, but I'm pretty sure you could chase it or clean it up)
Daniel Defense Lite Rail 12.0 - $200 (probably will need a new barrel nut)
Mapgul PRS Stock - $160