For our example we will show you how to buy a Monkeyzoo special edition NFT from the Dexie marketplace
Find an NFT collection you would like to purchase an NFT from.
Find the NFT you would like to purchase.
Click on the accept tab and select download offer file.
A file will appear in your download folder.
Under the offers tab on your Chia Gui (wallet) you need to select view an offer.
Either drag your downloaded offer file from your download folder or select the file using the browse on your computer button.
You can now
Accept the offer
You will pay the asking fee for the NFT and a creator royalty that goes directly to the original creator of the NFT.
Add a small fee to ensure the transaction goes through.
You can check for provenance on a number of explorers
You can then see your NFT in the Chia Gui (wallet) by visiting the NFT tab.
Make sure you check the creators DID to ensure you are buying a genuine NFT.