I've been in the computer sales/service business for about 30 years and have never come across a better buy in used computers. These hey have been completely cleaned up so the inside looks like brand new.  My strong suspicion is these are recycled business computers which were replaced for income tax reason at the end of their depreciation cycle. Apparently any faulty parts have been replaced and a brand new Windows 10 (without all the typical manufacturer garbage advertising software) installed on the hard disk. The keyboard and mouse were also brand-new in a box.  My only change was to add a 500GB Solid-state Drive as drive C: and re-assign the hard disk for backup, then clone the HD to the SSD with AOMEI free Backupper Standard software. Using the SSD, speed is almost as fast as many new late-model machines, and is certainly adequate for my business and personal use.I actually bought 3 of these (slightly different models) which came from 3 different recyclers, all located in Canada, apparently closely quality-controlled by Amazon. They all worked on arrival but one quit about 2 weeks later. I had no problem at all with the recycler's customer support and got a replacement a week or so later.If you're looking for a good, solid standard workhorse PC I don't think you can beat these for the price and lack of hassle, (Note they don't include a monitor, but used flat monitors are also inexpensive). Sine I'm not a gamer I can't comment on their suitability but I doubt they would be satisfactory for the newer games.