Ok guys heres the break down as I see it.

Rough numbers for a Emag
1) Unibody, something with the complexity of a shockwave (Make) $400
2) frame (Make, emag length) $300
3) Valve (from AGD) $250
4) Battery (from AGD) $89
5) PCB (Reflex Customs) $200
6) Trigger (Make) $45
7) Grips (Make) $35
8) Sear, Sear pin, Safety, selector, $55 +$7 +$7 +$15= $84
9) Battery pack (Make) $50??
10) Misc little things $20
11) Barrel (Buy) $60
12) feedneck $20??
12)Ano (Plan Black) $100

So a total of Approx $1600 before

13) Assembly? time = Money. It took 3 guys several days to fully assembly & test the 30 Niche Nemesis cockers.
14) Profit ?? No one works for free (Most of the time.)

Now the prices on some may be less but these are roughly what Ive been told by several non paintball machine shops for a run 25-50. Of course more means a slight quantity price break.

Now a Mech only Automag you could possibly drop about 5-600 off the cost.

The thing to remember is when say AGD or any big company does a run of parts its usually hundreds of parts. And if they own thier machines they can internally charge less.