Want to sell my $500 Amazon egiftcard for 0.0225 btc
I give you code you redeem it, then you send btc to my btc wallet.
Op it’s not safe to send the gift card to a stranger online at first. Neither it’s great to ask for money/BTC first.
You can send the gift card first to users who are trusted, but yes don’t send these to newbies at first.
Moreover for a better transaction and safety protocols, deal with ESCROW. While dealing with ESCROW, both the buyer and seller have protections against each other.
Also you may find potential customers for your gift cards in Digital Goods
https://bitcointalk.org/index.php?board=93.0 section.
Also a pro tip:- mention which country amazon gift card it is for more customers to show interest in your offer.