Gophinsin, The refurbs really are a great value! They are throughly cleaned in the shop here, and come back to your as close to brand new as possible. Priming the machine is certainly a good idea, even though there is a good chance that someone has run water through it previously. You can safely assume a normal descale schedule, as well. For the cleaning, the Gaggia Decalcifier is hard to beat and is all you will really need for taking care of your machine!