You can try Paxful or Localbitcoins.com
But recently they changed their policy and now required some sort of verification to increase your limits.
But still without verification you can trade your BTC to Fiat for a small amount within a limit.
Moreover if your sole purpose is to get gift cards in the exchange of the cryptos then do check out these sites:-
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AFAIK, in LBC it's mandatory regardless of the amount you want to trade. As for Paxful, apparently, the limits have been lowered from
1500 to 1000$ recently... I wouldn't be surprised if they follow LBC steps and make the identity verification obligatory.