Wanted to say thanks for the info in this thread.

I rented a compact car for 9 days from our small local airport for a trip for about 240. I got there and they offered me a Kia Sorento upgrade at no charge so I took it. While on the way home to pack my wife who was following me noticed the plates expired in July. Called to talk to them, got run around on the phone for ever and finally emergency roadside said I needed to take it back. Honestly I was pissed, another trip to the airport, missed going to the bank since it's now closed. The guy offered me a Murano. He said he couldn't offered me any discount now, but when I returned it he could take some off. In the end I got the Murano for 9 days for $167 instead of the almost $500 regular rental for it.

Thanks FT.