What Icewolf said... he and I both own them.
I've got a little board from AMDJ/chauvet/Elation (can't remember at the moment... is there really a difference?) that I purchased just for my two min-spots. I paid about $150 for it.
What is your application? They are cute but not very bright. I'm using them for teaching basic DMX setup, programing, and color mixing. I can't think of many straight theater applications for them unless you had a LOT of them. They wouldn't be bad for DJ use.
Thanks folks, to be honest I don't really belong here, I'm not a lighting professional, I use one of these among other units to create colour and ambience for my drumset, so I sneaked on here since you are the guys to ask.
Do I need a Chauvet DMX 40B controller for colour mixing, or something smaller?, not sure if this is the one you mention.