Check around. I bought a new one from a beverage factory place for like 85 bucks I think. It's not much more to buy new then used.
Also, I ended up buying my controller and solenoid from him. It was the same price as ebay so I didn't see why not. My first solenoid ended up having a pressure guage issue and when he got time, he ended up sending me a new one first and then I sent my old one back.