Help plz

So I am brand new to pc, and I was going to buy one off of Facebook. But I don’t know what to look for. I’ve been reading a bit and I’ve been seeing that I need 32gb RAM and 1tb of storage. I have a couple of different pcs showing up around me but they all seem the same to me. Plz help! My budget is 800, I’ve been seeing people putting their pcs on Facebook for 700-800 and saying they originally spent 1200-1500.

“Used gaming pc with a AMD 7600x with liquid cooling, 32gb of RAM, 1 tb ssd a platinum rated ps & a 3080 12gb graphics card. Brand new CPU and RAM. This will handle all new games at ultra 1080 or 2k. Also throwing in an Elgato 1080p capture card.”

These are a lot of what I’m finding on Facebook right now with very similar specs.