Built the following for under $700.
Case: https://www.amazon.com/gp/product/B01N5HIDXB/
CPU: https://www.amazon.com/gp/product/B0759FGJ3Q/
Motherboard: Amazon.com
Power supply: https://www.amazon.com/gp/aw/d/B01B72W0A2
SSD: Amazon.com
GPU: https://www.amazon.com/gp/product/B079NX4GCF/
Memory: https://www.amazon.com/gp/product/B016A29HKA/
If you’re starting from scratch, you’ll also need a $10 bluetooth dongle, keyboard, mouse, and of course TV or monitor. WiFi too, if you’re really starting from scratch.
Ha! That I did! So if you’re really truly super duper starting from scratch, there’s a Windows 10 license needed as well.
Bad link for the SSD and PSU.
Oy. Clearly did this before my AM coffee. Fixed now!
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I would suggest this SSD over the one you posted, it is a little over $10 more, but well worth it:
https://www.amazon.com/gp/product/B0781Z7Y3S/ref=oh_aui_search_asin_title?ie=UTF8&psc=1
I would also spend just a little more on the PSU: Amazon.com
For the memory, if you are just going to suggest 8GB I would go with: Amazon.com
Not sure if the CPU cooling is included in your spec out or not, but that needs to be a consideration and could change the case size.
You could probably save a little on the case if needed.
I run a Cryorig C7 ( <$30) cooler with my i5-8400/GTX 1060 SC 6gb mini-itx build - works great.
When I add all the items I get approx. 850$ 
Woah! I just got $760 before tax, but weird that prices have spiked since only a few weeks ago.
Yep, stock snap down cooler comes with the CPU. Temps are nice and stable for both CPU and GPU through an hour’s worth of riding. Definitely room to OC if/when I decide to fall into the Apex Legends vortex. 
I got this build list mainly from WePC.com. They do a good job at keeping up to date recommended specs/budget. I know, everybody has their own little tweak, but this list worked great for me and at least when I bought it all came in under $700. But I guess, as with most things, YMMV.
A general comment: https://pcpartpicker.com/ is a good site to match parts to build a computer build or add a new component. And you can see what others have picked.
