You can change the listed NFT price as often as you want without platform fees. However, you must pay gas fees that vary depending on the network.
To see your listed NFTs, click on the connected wallet address in the right corner of a page and choose "My account":
In the "Owned NFTs" section, switch to the "Listed" tab.
Select an NFT and open its page. Here you can see the "Edit" and "Delist" buttons:
If you choose "Edit listing," you go to the page you see while listing the NFT. Set the price and click "Next" to go through the confirmation process.
When you confirm transactions, your NFT’s price changes.