>>375217724
If you want to play VRChat your cpu is pretty dated but gpu will be fine.

Used vr gear is extremely hit or miss. Don't bother with a used index, since the warranty won't transfer and there's a 90% chance something is fucked with it.

Q2 with PCVR is a pretty good experience and cheap, with my 900 series card I get 35-40ms of latency which I don't notice.
You can firewall it from talking to the internet in your router if you're paranoid like I am.