This is the same one I got. Got it off of ebay too...well my wife did as a present for me a last Christmas. It is easy to self install, but search this site and others for direction on how to take dash/console apart. there are step-by-step instructions that include pictures. I found that extremely helpful. Careful though, the Nav unit/stereo is heavy.there's one on sale in ebay for roughly $250:
search: datasystem tv
the unit you want is the TTN-46
I'll try and see if I can look at the unit in my car. I know I threw away the box quite a while ago. I know that is the same brand though.i messaged the seller and asked if it works with my car and he said that it works with the JAPAN version and hes not sure if it works with the US IS-F. He does know it works with the 2006-2008 IS250 and 350. Im sure its the same, but I dont know if I wanna take that chance if its not 100%.