If price is a concern and appearance is less important, yu might consider a refurbished computer from one of the major makers if desktop computers.
The top desktop computers are made by:
Asus
Acer
Apple
Dell
HP Inc.
Lenovo
The last three Dell, HO and Lenovo have over half of the marker with HP being the leader. These three companies often sell or lease l large amounts of standard, ATX and smaller desktop computers. When these become older and the company wants newer equipment, they are resold to companies that specialize in restoration fd used desktop computers. Microsoft encourages such activity and will license Windows 10 to these refurbishing companies.
You can find authorized refurbish vendors on eBay. Look for the ones with a god reputation and have been in business for more than two or three years
Here is on Dell model, the 755, I personally like:
Dell Optiplex 755 Intel Core 2 Duo 2.33GHz Win 7 & 17" LCD He wants $300, which is on the high side, but it includes a 17 inch LCD monitor, keyboard, mouse and speakers. More important, it has a 30 day return policy.
But you can find others like it. Many with Windows 10 and for less money, but no monitor.
You can get a video card for the 755 and use two monitors. That is what I do.
I would not recommend the very small version, the SFF model. It does no have any expansion sots at all. I also have one of them, works, but you can not add anything.
Here is another link for
Dell Optiplex:
Dell Desktop Computer PC Core 2 Duo WINDOWS 10 + LCD + KB + MSThis vendor sells for less and offers what looks like the dame thing with options.
Also, Amazon and Newegg offer refurbished desktops from Dell and HP.
If you just want a business computer with no frills, I think you should consider a refurbished Desktop with the one year warranty option.
Lke I said, this is not a gaming PC. You dont get a gaming PC for $300. No yet.