I have a gaming PC in the bedroom that plays all the emulators. Even plays CEMU ( Wii U) emulator. The specs on it are I7 4790, 8gb ram and the graphics card is a GTX 750 TI 2gb. Surprised how good this graphics card is considering its dirt cheap. Can play every emulator iv threw at it. Dont know if your a mouse and keyboard player?. If not pick up a cheap Xbox 360 controller as they are easily configured for emulators. Xbox one controller is obviously better but you will pay a bit more. I dont know if you use it but i literally buy everything from the avforums classifieds these days:
https://www.avforums.com/categories/...d-adverts.242/
Go to computer classifieds and you will find all kind of stuff that folk sell cheaper than Ebay etc