Here are some cheap yet good gaming PC parts:
Processor: AMD Ryzen 3 3100
Graphics Card: Nvidia GeForce GTX 1650
Motherboard: MSI B450M-A PRO MAX
RAM: Corsair Vengeance LPX 8GB DDR4 3000MHz
Storage: Kingston A2000 500GB NVMe SSD
Power Supply: EVGA 500 W1
These parts will provide a decent gaming experience. However, keep in mind that you may need to adjust some parts depending on your specific needs and budget.
Buying