I contact the P2P through SimpleX Chat and ask them to send a voice message (since I'm already familiar with their voice from elsewhere) to confirm their identity. I receive a PDF with a bank invoice to print, and I pay in cash using it at an ATM. Once they verify the payment, I send them my address to receive it. Right now, I'm considering using PGP keys, but I'm still reading up on them. And of course, all of it without KYC requirements.