I have a Dell Optiplex 9020 MT with a i7-4790 CPU, a GeForce GT1030 GPU, 32 GB of Crucial DDR3L-1600 UDIMM RAM (which I purchased and upgraded the computer with), a 2 TB SATA SSD, two internal SATA 6 TB hard drives, and a stock 290 watt PSU.
Unfortunately it is not currently working and seems to be broken after being badly manhandled by a moving company (it now has an error that says it can't find the boot device and none of the recommended troubleshooting tips regarding BIOS setting changes have worked - also one of the fans was ripped out of place due to the manhandling) and I have to use my phone right now to type this message.
I'm looking for a potential replacement and would like to upgrade but within a reasonable price, ideally $400 or less. I want to buy refurbished (as I always do, usually from Amazon or Newegg) and ideally I would like to get a computer that would be compatible with the RAM I bought as well as the GPU (unless it comes with a better one, which would be even better, as the GT1030 is very limited), which I also bought, so that those investments wouldn't would not be a total waste. I figure that I could save some money by buying one with less RAM and reusing the RAM I I bought. I also can clone its operating system to my SSD with Macrium, so it's OK if it has a cheap hard drive.
I want it to come with Windows 10 Pro and to have a quad core (or more) CPU that's better than the one I have. I want to use it for HD video editing.