I bought two of these in December 2019 for personal use. The seller was TekRefurbs.  Overall, I was pleased with bang for the buck. The units have worked as advertised and are a pretty good value. They are good solid office desktop machines, not fancy, and the SSD is nice to have. I don't miss the lack of installed wifi because I use wired ethernet for all the desktop equipment.I ordered two more of the same units in September 2020 for a nonprofit I volunteer for. During setup, on one of them the DP (DisplayPort) video ports did not work. I called Amazon who put me in touch directly with TekRefurbs. I explained the problem to to a very nice customer service person, she sent me a prepaid Fedex label. I dropped the unit off at Fedex. This was on a Friday morning. They shipped a  replacement. LESS THAN 24 HOURS later (on Saturday morning) , the replacement unit was on my front porch. Can't complain about that. I won't mention the Customer Service Rep's name, but if I were ever to meet her in person, I would gladly buy her a cup of coffee.Customer service like that (on a refurbished PC) is unheard of. My thanks to TekRefurbs.