$500 is too tight.
PCPartPicker part list:
https://pcpartpicker.com/list/g2JqRJ
Price breakdown by merchant: https://pcpartpicker.com/list/g2JqRJ/by_merchant/
CPU: AMD - Ryzen 5 2600 3.4GHz 6-Core Processor ($189.99 @ Amazon)
Motherboard: ASRock - A320M-HDV Micro ATX AM4 Motherboard ($39.99 @ Newegg)
Memory: Team - Vulcan 16GB (2 x 8GB) DDR4-2400 Memory ($139.99 @ Newegg)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($42.99 @ OutletPC)
Video Card: Asus - GeForce GT 1030 2GB Phoenix Fan OC Video Card ($89.99 @ SuperBiiz)
Case: Cougar - MX330 ATX Mid Tower Case ($24.99 @ SuperBiiz)
Power Supply: SeaSonic - EVO Edition 620W 80+ Bronze Certified Fully-Modular ATX Power Supply ($39.90 @ Newegg)...