If you're willing to buy at least some PC parts used (like the GPU and maybe CPU) you could probably build a very competitive machine for the same price. Maybe even something better. With new parts probably not yet, necessarily. But of course, that depends a little on your local market. Here in Germany for example, a new RX 6800 (the equivalent GPU, according to IGN) alone would be roughly ⅔ of a PS5 Pro, while a used one is a little less than half the price. You probably need to wait a generation or so for new PC parts to be price competitive (as you do with almost every new console release).

However, if you already have an existing PC that you could upgrade (For example you have an earlier generation Ryzen processor and could upgrade to Ryzen 5000 with just a BIOS update and you could sell your current CPU and GPU to get some of your money back when buying something more powerful), you could likely easily beat it. That's the actual power of having a PC. You can stretch $700/800€ quite far, if you don't have to buy a new case, RAM, PSU, storage and/or motherboard.