Jeff be very careful buying one of these Lathe used. Many have been tampered with by their previous owners. I own one myself, I purchased it directly from Porper in December 2006. The new models are fully upgraded which many of the old models are not. If you find a used machine, find out the serial number and manufacture date, then contact Porper to see if it has been upgraded.
If I were you I would spend the extra money and buy it from Porper directly, it will save you a lot of trouble, and they are very easy to deal with if you have any questions.