I agree with Alan. If you have £5- 600 to spend you should be able to pick up a good used machine.
I still have mine and it makes a good back up machine. Very durable, big tanks in fact it's a big machine which I think customers like as in their eyes a big machine is going to be reaching parts that a small machine won't.
Downsides of the grace are the clips that hold the two parts of the machine together are flimsy. Although they never caused me a problem.
The wand the hand toll and the solution hose are not very good, although they will do the job and are a massive step up from a rug doctor.
Also If you run the Craftex inline heater with it plugged into the machine, you will be stretching the maximum power available from one socket. The machine has two 1.3 kw vac motors a water pump and the 1.8 kw heater. I think domestic sockets were only designed to supply 3.5 kw. I put a longer wire with a mains plug on the heater.