"Swear any promising-looking Efreet groups to secrecy about literally all aspects of the remainder of your negotiation and transaction, including the payment offered and the service sought and even whether or not the transaction with you concluded successfully at all, before discussing any other trades with them."
"I put four denominations of payment in your bag. If an Efreet group wants more payment than one of the largest denomination for one full service, or more than the least denomination of payment to agree to absolute indefinite secrecy, walk out."