Amazon has the Cooler Master MWE Gold 1250W ATX3.0 Fully Modular Power Supply (MPE-C501-AFCAG-3US) for $130 with free shipping. Has good Amazon Reviews.
Amazon has the AMD Ryzen 7 5700G 8-Core 16-Thread Unlocked Desktop Processor for $161 with free shipping. List price: $359. Features 8 cores, 16 threads, 4.6 GHz max boost clock. The Ultimate Desktop Processor with Graphics.
Has excellent Amazon Reviews.