The biggest problem with the Oki's are that they are typically used in very dirty, dusty environments, and they don't get their regular cleaning, and lubings. If you clean the printer regularly by blowing out all the paper chaff and clean & oil the carriage rod, these printers should last you just about forever. I have serviced many of these, and found these to be very reliable printers.
Timothy N. Couch
A1 Printech
Anchorage, AK