> For the complete documentation index, see [llms.txt](https://docs.bounce.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bounce.finance/user-guide/nft-sealed-bid-auction-guides/participate-in-an-nft-sealed-bid-auction.md).

# Participate in an NFT sealed-bid auction

### How to participate in an NFT English auction?

1\. Visit <https://app.bounce.finance/> and select **NFT auction house** at the top right of the page.

2\. Select **NFT sealed-bid auction** under pool type.

<figure><img src="/files/eotroi81RsmYRGaRqTAF" alt=""><figcaption></figcaption></figure>

3\. Find the NFT auction to participate in. Pay attention to the token contract address to ensure you enter the correct pool. If everything is correct click **join** and enter the **NFT auction** page.

<figure><img src="/files/F6KYuijna9DI7o8X1L08" alt=""><figcaption></figcaption></figure>

4\. To participate in a sealed-bid auction, enter the following parameters:

* **Bid swap ratio:** the price you want to pay per token. This amount can not be lower than the floor swap ratio.
* **Bid amount:** the amount in ETH you want to spend.

5\. Check the status of your bid by clicking “check your bids” button. **Once a bid transaction is executed, it can not be cancelled or withdrawn, as long as the auction is live.**

6\. Click **go** and confirm the transaction in MetaMask (or any other wallet you use).

*If a transaction error with very high gas fee (usually over 200 USD), appears please do not proceed and go back to the parameter page to check if everything is entered correctly.*

*7*. Pool participants need to come back to manually claim the NFT or unswapped ETH back. This can be done in one transaction at the end of the auction.

**A user can make only one bid transaction in one sealed-bid pool.**&#x20;