VAX carpet shampooer (Marlow Bottom SL7)

Vax Rapide Ultra Carpet Shampooer. Fair condition - the only thing actually broken is the on/off foot pedal which you need to stick down with a piece of duct tape or similar, which is annoying but doesn't stop it working. The waste water tank is also impossible to clean properly - a real design flaw, but again doesn't stop it working. And I have the instruction book.