There are two different listing options for your NFT:
As the token owner, you are able to choose how you would like to list your NFT. The listing options are either a reserve auction (which last for the auction duration set by the lister, once the reserve price has been met) or you can choose to list with a fixed price, which will bypass the auction process as a whole and transfer ownership instantly.
Reserve auctions can be great way to create extra hype around the selling of your token. When adding a timed countdown to the sale of your NFT it can encourage collectors to get in quick. As the creator you will be asked to set a reserve price for your NFT. The reserve price is the minimum amount you want to earn on that piece. Once a bid that matches your reserve price has been placed, the auction duration you set (between 1-10 days) will be triggered - starting your live auction.
Each subsequent bid offered after your reserve price will automatically be required to be 5% higher than the current bid placed. Collectors will not be able to offer anything lower.
If a bid is placed within the last 15 minutes of an auction, the countdown will reset back 15 minutes. This 15 minute reset window can continue as many times as necessary until the timer has finished. This extra time gives all bidders an extra chance to win the auction.
"Buy Now" listings allow for an NFT to be sold at a fixed price. You will be required to select a currency and a listing price for your listing. Keep in mind that once that once an NFT has been sold, the ownership of the token will be transferred to the new owner instantly.