The right way to do in-person exchanges is to use an escrow service like LocalBitcoins. Zero confirmation transactions are pretty easy to double-spend (and coul

The right way to do in-person exchanges is to use an escrow service like LocalBitcoins. Zero confirmation transactions are pretty easy to double-spend (and could be even easier in the future [1]) The seller funds the transaction in the escrow service before meeting the buyer. The buyer sees it's funded and can write down a confirmation code that the seller doesn't know. Then when they meet the seller counts the cash and sends a SMS to LocalBitcoins to release the funds. LocalBitcoins responds with the confirmation code which the buyer can check then hand over the cash. No one needs any computers, only the seller needs a phone. I tried it once and I felt like an arms dealer or something. [1] edit: IIRC there's some proposal to be able to override unconfirmed transactions to recover coins in limbo due to no transaction fees being included, or something.