I saw online that the last year, 2010 edition had USB as the "new" feature. Does this simply charge the phone, or does audio from phone integrate with the vehicle like modern cars today?

Definitely not expecting android auto or anything like that, ha.

Trying to think hypothetically how much of a premium I should put on a 2010 vs 2009 that's for sale.

 

I believe it has the same audio as my 2010 LS 460L. In my audio I select the USB function and plug it in and it plays music from my Iphone or my iPad. I believe they installed the 4th Gen Audio in the 2010 SC430.

Dennis