I have mixed emotions about the common attitude that they will all wear out. Yes, in time all mechanical devices wear out, BUT how much time does it take for a CD Transport? Now, I have destroyed a number of Cassette players and they were NEVER made with any reliability. I even wore out a couple of Professional models. Now when considering something like a CD transport it is hard to say. I would much rather agree with one comment about the Laser burning up than the CD motor or its track bearings. At least when talking about a better quality unit. Another analogy I would make is my HEPPA Air Filter. It is a relatively inexpensive unit and its fan has been running for 4 years straight, and the only time it has been turned off was at the periodic filter changes and once recently where I totally disassembled it for cleaning. This fan has only cheap oilite bronze bearings and has not missed a tick. I would have to say, "How much do you trust the previous owner's word on how much wear the device has had? Was it in a smoking environment? What BRAND and Model is it and how much engineering went into the device? How OLD is it really? How much is the device being sold for and are you willing to buy lottery tickets? If you can't answer any of these questions I would say get a new unit.