If you meet a seller’s buyer requirements, you have the ability to bid on and purchase what they are selling without spending any money upfront.
Once you have made your purchase, you have 72 hours to pay for the item, sponsor it, or make it an unpaid item.
Additionally, if you choose to sponsor a listing and fail to resell it, you can choose to keep the item or make it unpaid. Making an item unpaid simply means that you are cancelling the transaction.
Please be aware that using the unpaid item feature excessively can cause you to lose your “Pay Now $0” privileges.