100% @bigtwin
For smaller purchases, PP F/F is fine. Anything major, wire transfer, or cash on pick up. It is up to the buyer to vet the seller through conversation, feedback, etc. Always ship fully insured, after payment received and cleared into your account. Many will ask you to devalue the shipment to save them on duties or taxes. Don't do that. I recently sold high value speakers to Taiwan; the buyer completely trusted me based on USAudiomart feedback.