The moog racks don't seem to have a power supply that's why they are a bit cheaper, or is there something new?
That's right. Compare the Moog case to the Tip Top Happy Ending, which is a bare-bones unenclosed rack with power supply for $160; or to the Pittsburgh Modular Cell[48], which is enclosed with power supply for $250. The Moog case plus a uZeus power supply seems like a much more attractive option at about $170.
There's also the option of carpentering up your own case, and getting a cheap power distribution board, and adding your own Molex power supply. This can be built for maybe $45, assuming you've already got some wood laying around, with some wood glue, drill, etc. It might be fun to see how cheap I could build a eurorack system.