I recently upgraded to the new Apple TV3 by replacing my two Apple TV2 units. Before I replaced the TV2s I upgraded their software to version 5.

I have placed my Apple TV2s on eBay where other units are being sold for, what I consider, a high price. They can often fetch nearly as much as the full retail price of the Apple TV3. I have had numerous questions from prospective bidders asking about the software version on the TV2. When informed that it is version 5 they seem to be less interested and in fact inform me that they are specifically looking for units with the older version 4 software.

An Apple retailer here in London was recently offering as much as a 50% discount off an Apple TV3 if you trade in an Apple TV2, but it must have the older software.

Anybody know what is going on?