Sounds like you lucked out. A few times I've scored deals like that, once it was $1/day and another was $5/day for a Camaro. Both of those were honored and the desk agent just said something like "looks like you got a good rate!" I wouldn't call in to verify it because that would give them reason to investigate and possibly adjust your rate. Just keep your confirmation email with your rate, and make a back-up reservation at another rental car agency just in case something happens when you show up. That being said, sounds like you got lucky and enjoy your SUV.