Which retailer was it? I'd like to know so that I could avoid them in the future.(it turns out that, although I bought my nano from a well-known, nation-wide chain store, they weren't actually "official" Apple resellers; they bought their stock from a second, or maybe third, tier distributor, just to be able to carry Apple products on their shelves. Lesson learned on my part; since Apple prices rarely vary, I now always purchase directly from the Apple store or one of the true, reputable Apple vendors out there)
If you would like to post the serial # I can look up this information for you. I am an apple certified technician and have access to that info.