As jason voorhees said if u want top end gaming on pc it will cost u about $2000 ive been looking into it myself lately as i want to upgrade my laptop eventually.
It doesnt have to run that much. Here's some example parts that put together would make a REALLY nice rig for anyone.
A nice motherboard is 120 bucks: https://www.amazon.c...asrock lga 1150
A good video card can be had for under 300. https://www.amazon.c...ords=radeon 480
16 gigs of RAM. $100 https://www.amazon.c...ll ripjaws 16gb
A very good CPU can be had for 235. https://www.amazon.c...&keywords=4690k
You'll need a power supply to run it. I usually suggest 750 watt minimum for a gaming PC. You DO NOT SKIMP on a power supply. Get a reputable brand. EVGA is good. Hundred bucks: https://www.amazon.c...words=evga 750w
1tb hard drive will run you about $75. Take your pick. No reason to link a suggestion, they're everywhere.
Case will run you as much as you want to spend. Another hundred bucks is generous, though you can spend more. Just get something decent with adequate cooling.
If you have to buy Windows, that of course will run you $125.
Most people already have a monitor, keyboard and mouse. If you have to buy them then it of course will add more but you dont need a $300 monitor. So everything I listed above totals (with prime shipping, of course, so no extra) to about $1150. Well under the $2k mark. You dont NEED a solid state hard drive. Sure they're nice but it doesnt affect in game performance or framerates.
It's easily upgradeable for when the next gen graphics cards come out but the 8 gig RX 480 I linked will last quite a while. I'm still running an R9 290 myself and since I am one of those guys that will only use Radeon/AMD video cards there's nothing out there that makes sense for me to upgrade to yet. (I like AMD's image quality better than Nvidia's. Some/mostpeople dont care.)
None of the components I listed above are compromises, they are all excellent quality. I use them as examples but put them together and you have a very competent rig. It's also overclockable to squeeze out some more performance if that's ever something you want to experiment with - and I do suggest it with the Intel "K" processors. MOdern motherboards make it very simple, though you'll want to purchase a cooling upgrade if you want to try it out. My own 4690k doesnt OC very well but that's the luck of the draw. And I'm on stock cooling.
All that to say, $2000 for a gaming PC is the luxury stuff and it doesnt have to come near that to get good FPS no matter what you throw at it.