How to sell NFTs for Ethereum (ETH)? (OpenSea & Blur guide)

Setting Up Your Wallet for NFT Sales

1. Install a Web3-compatible wallet such as MetaMask or Coinbase Wallet. These tools allow direct interaction with Ethereum-based marketplaces.

2. Ensure your wallet holds sufficient ETH to cover gas fees during listing and sale execution. Gas prices fluctuate depending on network congestion.

3. Connect the wallet to OpenSea or Blur by clicking the wallet icon in the top-right corner of each platform’s interface.

4. Verify wallet address consistency across platforms—accidental connection to a different network (e.g., Polygon instead of Ethereum Mainnet) may prevent transactions from confirming.

5. Confirm that your wallet is set to the Ethereum Mainnet. Both OpenSea and Blur require this configuration to list and sell NFTs denominated in ETH.

Listing NFTs on OpenSea

1. Navigate to your profile and select “My Collections” to locate the NFT you wish to sell.

2. Click the “Sell” button beneath the asset thumbnail to initiate the listing flow.

3. Choose between fixed price, declining price (Dutch auction), or English auction formats. Fixed price is most common for immediate ETH settlement.

4. Enter the desired ETH amount and specify duration—listings can be time-bound or permanent until canceled or sold.

5. Sign two transactions: one to approve the OpenSea smart contract to transfer the NFT, and another to create the listing. Both require ETH for gas.

Listing NFTs on Blur

1. Access Blur’s interface and go to “Portfolio” to view owned NFTs eligible for listing.

2. Hover over the NFT and click the three-dot menu, then select “List”.

3. Input the ETH price and choose listing type—Blur supports only fixed-price listings for standard sales.

4. Approve the Blur proxy contract via wallet signature. This step grants permission to move the NFT upon sale.

5. Confirm the final listing transaction. Blur displays real-time gas estimates and allows batch approvals for multiple assets.

Fees and Transaction Mechanics

1. OpenSea charges a 2.5% fee on successful sales, deducted automatically from the ETH proceeds before depositing funds into your wallet.

2. Blur does not charge a marketplace fee for sales but requires users to pay gas for both approval and listing actions—no commission is taken from the sale amount.

3. Royalties are enforced at the protocol level on OpenSea for collections supporting EIP-2981; Blur respects royalty settings but may display lower enforcement rates depending on buyer behavior.

4. All transfers occur through verified smart contracts—neither OpenSea nor Blur holds custody of your NFTs after listing.

5. ETH received from sales appears directly in your connected wallet without intermediary withdrawal steps or KYC delays.

Troubleshooting Common Listing Issues

1. If a listing fails with “execution reverted”, check whether the NFT contract is paused or if the collection has restricted transfer functions.

2. Listings may not appear in search results immediately due to indexing latency—allow up to 15 minutes for visibility on OpenSea and under 5 minutes on Blur.

3. Canceling an active listing triggers a gas-cost transaction; unused listings remain live until manually revoked or sold.

4. Wallet disconnection during signing interrupts the process—always recheck wallet status before initiating any action.

5. Mismatched chain selection causes silent failures—Ethereum Mainnet must be selected both in wallet and marketplace UI.

Frequently Asked Questions

Q: Can I list an NFT on both OpenSea and Blur simultaneously?A: Yes. Listings are non-exclusive since ownership remains in your wallet. However, selling on one platform automatically invalidates pending offers elsewhere.

Q: Why does my NFT show “Not Listed” even after signing all transactions?A: The NFT may reside on a testnet or unsupported chain. Confirm the token address matches an Ethereum Mainnet contract using Etherscan.

Q: Do I need to re-approve my wallet every time I list a new NFT?A: Only if the NFT belongs to a different smart contract. One approval per collection usually suffices unless the contract owner revokes permissions.

Q: Can I change the price of an active listing?A: Yes on OpenSea—edit the listing directly from your profile. On Blur, cancel and relist to adjust pricing.