How can I Sell my Google Play gift cards for bitcoin?

I'm interested in exploring the possibility of converting my unused Google Play gift cards into bitcoin. Could you please elaborate on the steps involved in this process? Are there any trusted platforms or marketplaces that facilitate such transactions? Are there any security concerns I should be aware of? Also, what factors should I consider in determining the fair value of my gift cards in terms of bitcoin? I'm eager to understand the logistics and best practices to ensure a smooth and secure exchange.