I purchased this lens used about 6 years ago, and it has been amazing! Unfortunately, about a year ago the AF stopped working. I contacted Tamron to fix it, and they told me the serial number (026214) was grey market and they wouldn’t work on it. I used it for a year taking great pics with it using manual focus, but decided I needed AF for my kids’ sports activities. The lens is in great condition The zoom and focus rings are smooth. There are a few dust specs, no fungus, and a small scratch on the front element that does not impact the beautiful images. If you’re looking for the reach of the 70-200 and the low light capability of a 2.8 and can handle manual focus, this lens is for you!!