In link sales? I informed a buyer to use the instant pay feature and once they do it marks the thread as sold, meaning there is no way to have multiple people pay for the same item. It should be like eBay where you set up a fixed price auction and multiple people can pay for it without it being considered sold. Perhaps the seller can input the amount of items in their inventory and the thread isn't marked sold until that number is reached, allowing all buyers to use the instant pay feature.