Sounds like an impatient buyer. Some people expect that things will show up the next day after delivery, no matter how you ship it. 😕 Since I didn’t see the auction listing, it might be a good thing to mention that packages may take anywhere from x-x # of days to arrive once it leaves your hands and that delivery time is out of your control once in the hands of USPS (or whatever shipping company you should use). Just something to be able to point to when you have an impatient seller. If he expected it to ship priority though (if the auction listed priority as the shipping method and he wasn’t made aware it was shipping any other way), depending on how long it takes to arrive (a week or more… priority generally doesn’t take this long in the continental US at least), I could see why he might be a bit concerned, but he’s still impatient (since he did ask just four days later where his package was).