1) Sell a disposable pen to someone for $85 USD via paypal
2) Ship pen by registered mail to confirmed paypal address
3) Also send a bitcoin to the buyer's bitcoin wallet as a "free gift"
4)
?
5) PROFIT
2) Ship pen by registered mail to confirmed paypal address
3) Also send a bitcoin to the buyer's bitcoin wallet as a "free gift"
4)
?5) PROFIT
Buyer reports pen not as described and sends it back to you for a full refund.