Yeah, $3654 shipped for:
1) the SAS kit
2) 2 shocks w/travel resivoirs
3) 2 8" springs
4) 2 12" springs
5) front driveshaft
6) rear replacement system

'course shipping will likely vary based on where you are.

Since we're talking costs, here are some more:
1) Rusty POS axle I ended up deciding not to use - $125
2) A bunch of flapper discs, grinding discs and other random stuff from harbor freight - ~$100
3) Extra D44 hub from Ebay that I don't need since I got a better axle - $30 shipped
4) Good axle - $350
5) H233B 5.142 gears - $450 shipped
6) Warn premium hubs, open carrier, gear install kit, and Yukon 5.125 gears from Complete Offroad, $406 shipped
7) U joints, ball joints, brake calipers, rotors, and a bunch of other random axle parts at Auto Zone - ~$360
8) Purple Cranium D44 diff guard ~$120 shipped

Future:
1) D44 ARB air locker, $700
2) Calmini SAS sway bar system $400

...And as long as I can keep my brain from adding those numbers up I will be able to retain my sanity.