Airbag Refill System

I have x 2 brand new BCA Float Airbag Cylinders for sale at £100 each. Also I am selling a Float Cylinder Refill system. This includes a certificated and tested dive tank and the refill adapter to connect to the above cylinders and refill them. The tank is full. I would be looking at £200 for this. I am too out the way for doing the refills. My last customer drove over from Aberdeen as I am the only place doing it and he said next time it would be eaiser just bying a new cylinder! Maybe an opportunity for someone more central.