In before people telling me not to do it, I'm selling a set of books online worth less than $30 with postage of around $15 tracked so it's not a massive loss if shit goes south.
Obviously I'm looking to receive payment before postage but I plan on sending my ID to the buyer as assurance.
The buyer has suggested paypal/beem/bank transfer - which would be the best option please?
Bad idea. If your buyer is paying you they've re-assured themselves you're legit.
Use PayID linked to your bank acct so you get paid instant.