Rarible.com is one of the most popular NFT marketplaces. There are thousands of collections from a single NFT and series ones.
I tried to sell my NFTs on Rarible.com Here is one of my NFTs on Rarible.
https://twitter.com/ahmadfz1/status/1549764727659970561
I tried my luck in this marketplace. Your NFTs still have no buyers when you create them. Your listings are on your collection page, but all your NFTs will be seen on the marketplace.
When you set your NFTs for free listing, you do not have to pay the gas fee to mint. Your NFTs are not transferable before buyers buy them.

How to sell your NFTs for free on Rarible?

1. You need an Ethereum wallet.You'd better download Metamask for your browser.
2. Log in to rarible.com with your Metamask wallet.
3. Create your NFTs
   
   There are four chains that you can use. Ethereum, Solana, Tezos, and Polygon. To mint your NFTs for free, you should use the Ethereum network.
   
   Choose Type , you can use Single or Multiple
   
   Upload your file, set the price, and add the title and description of your NFT.
   
   I prefer to use Rarible for minting my NFTs.
   
   After that you need to click Create.
   There will be a pop up page. You need to sign in to your Metamask wallet. The Metamask wallet will pop up automatically. You need to click sign.
   
   Done, your NFTs are listed on the market. You still can not transfer it because you have not paid the gas fee to mint your NFT. After a buyer buys your NFTs, your NFTs will be minted and transferred to your buyer. The buyer will pay the gas fee to mint your NFTs.
   
   Notes : There are thousands of NFTs in the marketplace. Your NFTs will compete with others. Here, you just wait for the buyers to buy your NFTs. You can check my NFTs on Rarible.
   https://rarible.com/token/0xc9154424b823b10579895ccbe442d41b9abd96ed:25732847896733145325093411680953981360497556741225593424856601152220647391239