The SIGN Art Marketplace is the secondary market which allows collectors of NFT's to re-list their NFT's for sale.
The Marketplace is where you'll find NFT's that have been collected previously and are now being listed for sale by their collectors.
SIGN Art Marketplace
You'll be able to list NFT's for sale here if you've collected and NFT, and you're also able to purchase previously sold NFT's here.
On the Marketplace NFT listings, you'll find a clickable text to the 'Initial Drop', which will bring you to the original page where the NFT was sold.
The Marketplace NFT listings will also show the current owner of the NFT. You're able to purchase and make offers for any NFT that you'd like to have.