The group handle alone would be worth $45.00 by itself if you had to replace it with a new one.
Someone must have old stock they need to off load.
Be careful as in, in view of the above (old stock?) I would ask if they will demonstrate the machine for you. Its a very simple process and will only take a few minutes (if they are in the know).
If it is blocked and wont flow water I then wouldnt buy it because if it is new you will then get caught up in warranty stuff as in, buy it and take it straight in for service. That wouldnt be convenient to my point of view...and of course if you attempted to work on it yourself you would then void any possible warranty on anything happening later on.
So....$45.00 is a great price but......weigh it all up and.....your choice.