Coinbase NFT requires a successfully connected wallet to purchase and custody NFTs. You can purchase NFTs using the ETH in your wallet or your Coinbase account, plus a gas fee. Making offers or bidding on items requires wETH. More crypto assets and blockchain support is also planned for Coinbase NFT for a later date.
To purchase using your Coinbase account, select Coinbase Pay during checkout and connect your Coinbase account to your Coinbase NFT account. Once connected, you will be shown the ETH balance in your Coinbase account and can use it to purchase the NFT without any fees
Note: Since the NFT purchase is an on-chain transaction, you will still be charged a gas fee.