Thanks very much for taking the time to reply to my post!
I went ahead and bought a DC900 (the ad said it was brand new not refurbished) off e bay for 75 pounds. It comes with the black carry case so I'm happy with the price. I should be able to get a charger for around 50 or less if I'm lucky.
Quite excited really as have Been using a bosch 12v nicad for an eternity and plugging in for the tuff stuff! Will let you know if it turns up
MajorMagnuM