I have a regulator, bubble counter and a drop check (but it is really dirty). I paid about 150 for all. I don't have the CO2 tank anymore.
The regulator is electric (on when powered, off without power) and has a built in needle valve along with 2 gauges. The bubble counter is separate.
I could take some pictures but it won't be until late tonight and would have to let you know then make/model etc of the regulator. I'm at work now so can't right now.
I was going to list it for 75+shipping once I moved in a month.