At the Fantastic General Store, as is the case in most stores, we have a limit to how much product we can carry at one time. There isn’t an infinite void in the warehouse, though I wouldn’t be surprised if some businessmen, have considered hiring mad scientists to make a black hole for just that purpose. We also don’t make what we sell, but instead, just act as a central location to buy items from. So, we have times when a product simply isn’t coming in fast enough to meet the needs of every customer, or just isn’t coming in at all. Yes, there are products we can order for you, but we can’t special order everything. There is also the problem that not everyone picks up their special order after they have ordered it, and those special orders sometimes are so unusual, they won’t sell to anyone else. It could be something as simple as a nametag, to something as exotic as a specially formulated youth potion, or what normal people call wrinkle cream. So, whenever we have customers who insist on us providing whatever out-of-stock item they want, they’re being unreasonable. If it isn’t in the back, we can’t get said product right away. Some of us already know what you want isn’t even in the back, because we’ve already been back there ten time before. Supply issues are a thing, and we don’t all have Rumple Stilkin’s ability to spin straw into gold. If we say something is out of stock, have the courtesy to believe us. We don’t like losing money any more than you like not getting what you want.