Can't figure out my trim level. HELPPP!!

Hi all! I have a 2011 Toyota Prius on which I am trying to figure out the trim. I am by no means incompetent and understand a good bit about cars but I can't seem to figure out something so simple so I'm turning to you guys. So here is my problem: On my title/car renewal slips, it always says it's a III, however, my car has the leatherette seats, which were something I thought were exclusive to the IV and V. The car, however, doesn't have the garage door opener which I believe is standard on the IV and not an option for adding to the III. To make things even more complicated, I have the on board handsfree system, an option for the IV but not for the III and I also have heated seats for the driver and passenger seats, something that appears to be only for the V! Please help guys I'm considering selling this one to upgrade to a newer version and I really want to know the actually trim so I can get all that its worth. Thanks for your time!