Gas free trading of NFTs on OpenSea with Polygon

Sze(‘Z’) Wong
4 min readAug 28, 2021

Why you want to buy NFT on Polygon, and How.

Photo by Executium on Unsplash

If you have ever bought or sold any NFTs, you know you have to pay gas. Gas is the transaction fee that we, as users, have to pay the miners for maintaining the Ethereum network.

Recently, I bought the follow piece from artist Michael Chuah for 0.015 ETH (~$49)

NFT Transaction (Kodekkusu Brother)

For this transaction, I have to pay 0.017 ETH (~$57) in gas. Bring the total to 0.032 ETH (~$105)

That’s right! The gas fee is 113% of the item price!

The high gas fee gave a lot of collectors pause on buying NFTs.

Note that this happens on the minting side also, Michael had to pay gas when minting this piece.

This is why I am encouraging all artists and collectors to look into trading in the Polygon chain instead of the Ethereum chain. With the Polygon chain (a layer-2 blockchain), you can mint and buy NFT at zero gas fee.

You are still transacting using the ETH currency, it’s just that the money is deposited into another blockchain. The 2 blockchains are pretty much like 2 separate banks. Ethereum is a bank that…

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Sze(‘Z’) Wong

Serial entrepreneur, AI inventor, author and educator. CEO@Zerion Software, Co-founder@Zenith Venture Studio