I am new to this and have done some looking. I found good prices at the following places
I just bought a complete RRA upper 16" A3 for $375 shipped and insured. He also has complet lowers with the A2 stock for $210 and $290 with th NM trigger. I shot a guys AR-15 with the RRA NM trigger at my last shoot and it made all the difference in the world.
Complete DPMS lower with the ACE stocks from $280! These stocks are cool and lightweight.
Just hoping this thread could save someone a few bucks or help someone with a build. Both sites have great customer service. Just look around the board and you will see that.