The machines mechanically are identical. Itek and AB Dick both resold the Ryobi in the US. Iteks are going to be a bit older as they haven't sold them new in quite a while. AB Dick still sells new ones. I would stay away from the conventional dampening on the Itek. If possible get one with either Crestlines or Kompacs. Kompacs are supposed to be a little better. I have an Itek with Crestlines, and it comes up to color in under 10 sheets. The Crestlines rollers only last a year or so, whereas the Kompacs last considerably longer. A new set of Kompacs is about $4500 USD, a set of Crestlines a little cheaper. If the Itek was maintained well, it will print very well, and you could even do 4 color process. You can tell the age by the number of feeder belts. I can't remember the exact age to belt ratio, maybe someone else can help you with that. Good luck on your press purchase.