I would agree with the OP. This is a rather amazing find because
(i) the golden ears are still being sold at Disney parks, at least till the end of Sept., so Disney is not dumping this out yet as leftovers;
(ii) it is being sold that cheaply (you pay, what, more than $12 for those brand new?)
(iii) it is still being sought-after by visitors to the theme parks.
Now, what you left out is which golden ears it is. There are three different types: (i) Disneyland's golden ears (ii) WDW golden ears (iii) the golden ears that they gave out on July 17 2005.
I'm guessing that it is not (iii) since you said there's nothing on the back. That hat has the date embroided there. This hat is very much sought-after since it was only given out on that day, and you can't buy it (maybe at ebay). The one that I have, I have it displayed under a clear glass case.
Zz.