> For the complete documentation index, see [llms.txt](https://l1x-sdk.gitbook.io/l1x-foundation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://l1x-sdk.gitbook.io/l1x-foundation/l1x-technology-explained/x-talk/use-case-advertise-bsc-nft-sale-in-opensea-ethereum-marketplace.md).

# Use Case: Advertise BSC NFT Sale in OpenSea Ethereum Marketplace

Generally, a seller having an NFT on a blockchain, usually prefers to advertise selling the NFT in a marketplace on the same blockchain. This limits the advertisements' visibility to a larger audience of potential buyers. To provide greater liquidity and a larger user base, a seller may wish to advertise the NFT sale in another marketplace on the Ethereum blockchain. For this purpose, cross- chain bridges are utilized. But these cross-chain bridges may not be completely decentralized or safe.

X-TALK allows any user on an EVM-compatible blockchain to publish an advertisement for an NFT sale in the OpenSea marketplace on the Ethereum blockchain network in a completely decentralized way. This section describes the X-TALK workflow for this scenario.

**Scenario**: The seller has an NFT on the Binance Smart Chain.

**Aim**: To advertise NFT on OpenSea Ethereum Marketplace