Gift cards for 40% of the balance are an outright scam.
You can recognize a fraudster by the following circumstances:
- Requires prepayment
- Refuses reliable Escrow or offers his accomplice as Escrow
Real carders sell gift cards to buyers for 85-90% of the balance or buy cryptocurrency with them on paxful.
Be careful - don't buy anything from them, otherwise you will lose money and be sad.