Honestly, if you're planning to do mostly softies, LPS, and easy SPS, I think this system would be overkill for you. This is the first I've really given thought to selling the setup, so I'd have to give some thought as to what I would ask for it... and it would also depend on if I end up selling the entire package or parting out.
A Mag 3 is split between the return and drives the skimmer... it travels through a GFO reactor and chiller before returning to the tank. There is also a Mag 9 running a closed loop for additional flow. The lights are 2x70 MH + 2x18w Actinic PC... so this definitely requires a chiller due to the closed top (I wanted it to remain looking stock from the outside).
I've got about $1,600 into the system...
$700 JBJ / Nanocustoms 24g Nano Cube (not incl. stand)
$350 AquaC Custom Sump & Top Off Reservoir / Remora Skimmer / Mag 3 Pump
$300 JBJ 1/20 HP Chiller
$100 Mag 9 Pump
$ 80 JBJ Auto Top-Off
$ 50 Misc. Plumbing