Right, have had a think about all the bits that are in there.

Looking for about £550 posted for it as a chassis and complete pneumatics system, including Battleswitch. Will do a bit less than that if you want to buy the main bottle and fit it yourself.

Complete robot minus radio gear looking at around £750 with addition of radio gear around £800.

Thats pretty much the cost of the parts within it. I hope i've been fair here in estimating these parts. Anyone else in the know please feel free to comment and confirm/challenge the price i'm asking on how fair it is.