Buying an item on a Christmas wishlist.
Vendor 1: Lists five in stock. I order one, then the next day they tell me that they're out of stock.
Vendors 2 through 5: None in stock.
Vendor 6: Lists one in stock. I order it. A couple of days later I'm told that my order is shipping today via CourierPost. AKL->WHK is usually overnight, but after three days nothing has turned up. I contact the vendor and ask for a tracking number. "I'm so sorry but it didn't ship like it was supposed to. Our system says we have one in stock but we can't find it."
At this point I'm giving up and she'll be getting a gift voucher and a story.

