$850 is a tough market now this day in age. As everything has SKYROCKETED in the consumer price index. Most parts are as follows to get you decently good hardware. You dont need to break the bank. But this is the average shopping list prices you will spend on a gaming rig.
Motherboard: 180
CPU: 260
GPU: 270
OS: 120
HDD: 70
Power supply: 125
RAM: 105
Extra Cables: 35
CPU Cooler: 22
Case: 165
gaming Monitor: 270
Gaming Mouse: 50
gaming Mouse pad: 30
Gaming keyboard: 65
Overall its about $1,700.00 to get into the pc gaming market to have an “ideal experience” on overwatch.