How to Trade on an NFT Marketplace?

SunContract introduced the first global NFT Marketplace this year. The NFT Marketplace allows buying and selling NFTs, and it tokenizes real and already operational solar panels. So, how can a user get the desired NFT from a previous series that has already been sold out?  The “Trade” button takes you to the secondary market, where you can place an offer to purchase the selected NFT.... source: https://beincrypto.com/how-to-trade-on-an-nft-marketplace/