gm! Thanks for reaching out. The mechanic is a little different between pre-minting the tokens and using a claim page.
Sounds like you have pre-minted 100 tokens and have already covered the gas fees to mint the tokens. The tokens exist on chain and then to sell them you would list them on a platform of your choice or a tool like Manifold Gallery.
A claim page allows creators to create a page where the tokens have yet to be minted. In this case the the collectors cover the gas fees to mint the tokens to their own wallet. When a claim page is created, no tokens have been minted until collectors go through the minting.
Hope this clears things up. Happy holidays!