Local guy on Craigsist has a 9500ix for sale. The serial number indicates it was made in the 20th week of 2009. I verified this with Escort and they said it's a valid serial.
Other than software updates (which I can pay for), were there any other changes made to these since mid-2009? Escort says other than the modification of the USB port so you no longer need a separate power supply, there were no changes.
I don't buy that -- find it hard to believe the antennas or other things weren't changed for 3 years.