My Living Room VR/Gaming/Home Theater PC! works great and I got the parts mostly used on ebay/craigslist/reddit. definitely my price:performance king out of all my builds.

Ryzen 7 1700 @3925MHz 1.28v
ASUS B350m Prime AM4
16GB Corsair Vengeance RGB Pro 3200MHz
ASUS ROG STRIX GeForce GTX 1080 TI 11GB GDDR5X (2040MHz/12000MHz)
Intel 545s 512GB SATA III SSD
Silicon Power 512GB SATA III SSD
Hitachi 3TB 7200RPM SATA III HDD
EVGA 750W G3 Gold PSU
Corsair H60 Push/Pull Corsair SP120 w/ Cablemod sleeves
NZXT H400i mATX
34" Samsung CF791 3440x1440 100Hz Freesync Monitor
65" Vizio P-Series 2018 4k HDR TV
Aukey Tenkeyless Mechanical Keyboard
Logitech K400 Plus Wireless Touch Keyboard
Elgato Stream Deck Mini
Corsair Dark Pro SE Wireless Mouse
Xbox One Controller
Corsair Void 7.1 RGB Wireless Headset
Polk Audio MagniFi Mini
Logitech C930e Webcam
PS4 Pro, PS3 Slim, Nintendo Switch, Nvidia Shield TV
Oculus Rift CV1 + Oculus Touch