The dell optiplex 990 mini tower refurbished is a particular desktop computers option for you who want this certified refurbished product is tested and certified by the manufacturer or by a third-party refurbisher to look and work like new,with limited to no signs of wear.the refurbishing process includes functionality testing,inspection,reconditioning and repackaging.the product ships with all relevant accessories,a minimum 90-day warranty,and may arrive in a generic white or brown box.only select sellers who maintain a high performance bar may offer certified refurbished products on amazon.. It’s a nice design gaming computer for under $580 price.