Aristo cold head

I know nothing about cold heads (except being bald in a Minnesota Winter).

Need something for the 8x10 Saltzman enlarger. On EvilBay there is an
Aristo 
T12.

Seller wants $575 BIN. Here is the ad copy:

"This is the top-of-the-line 8x10 enlarger light source.  Aristo T12 High 
Intensity Light Head is a two part unit -lamp housing and power pack-
which 
contains a three prong thermo cord which operates the thermostatically 
controlled heater. This is plugged into any available 115V outlet. The
lamp 
housing is 11-7/8" x 11-7/8" x 6-3/4" high."

Is that everything I need for the light source? Is there a particular 
"gotcha" to beware of?

I truly appreciate any help on this you all can offer.

John