Here's a complete grocery list for my 15/6. All prices are with shipping. Getting the 3015LF from beachaudio and getting one of those $60 NM410s would have gotten me down to $450.
tsgaudio -eBay 3015LF 149.99 ~$520
Erseaudio 3.00mH 16ga IXQ Coil - Laminated Core Inductor 42.55
1.30mH 18ga EQ -Perfect Lay High Bond Air Core Inductor
30.0uF 400V PulseX - Metallized Polypropylene Film Capacitor
12.0uF 400V PulseX - Metallized Polypropylene Film Capacitor
2.00μF 400v PulseX - Metallized Polypropylene Film Capacitor
Partsconnexion 3 - 4.5ohm 50W Mills resistors 29.75
2 - 755ohm 50W Mills resistors
Loudspeakersplus 6nm410 148.74
Menards 4'x8' sheet of 1/2" birch plywood 20
Radio Shack 6-position barrier strip 2.59
Speakerhardware 8- Penn Elcom Chevron corners 54.18
4- Recex screws 1/2-8
32- cabinet screws 1/2-6
10.6 oz PL Premiun
2- Penn Spring flush handle
8- 10/32 hurricane nuts
8- 10/32 cap screws
4- rubber feet
Speakon jack plate kit
JoAnn Fabrics polyfill 22.5
spray adhesive
Reliable Hardware grille 42.76
Adamson's stain 7.00