Dear CMoore,
It does not need a proprietary power supply although a voltage stabilizer would be nice if you try color.
I wouldn't pay more but the link from Matt would be easier to get up and running as the baseboard already exists. Before any purchase, make sure they have a negative carrier included.
Enlargers are pretty simple and anything with a color head is likely a decent purchase.
The unit will be very handy for b&w printing as contrast can be dialed in or out as needed. The biggest limitation I can see for it is that it only prints 35mm.
Good luck and enjoy whatever you decide,
Neal Wydra