Hello Waraphop,
Thank you for contacting eBay with regard to paying for an item after winning an auction.
I appreciate you taking time to get in touch with us ad will surely guide you regarding this.
I would like to share with you that once a winner wins an item in auction, they are in contract with the seller. A buyer gets 48 hours to pay for the item without any deadline while after 48 hours, the seller can open a case on eBay for non payment of the item, if the item is not paid. However, if the buyer and seller agrees to wait for the transaction to complete mutually, the buyer can then pay within 30 days from the date of purchase.
In case, the buyer doesn't want to pay or cancel the transaction then they may discuss this with the seller and ask them to cancel the transaction. If the seller opens any Unpaid item case, then the buyer may get back to us once the case is closed, so that we may look into it and help them further with regard to their concerns if any.
Kind regards,
Rohit D.
eBay Customer Support