I posted this in the regional section thought I would have a better chance of a response here. Other than the dealerships, are there any places in Northern Virginia that does the transmission fluid change?

 

I'm assuming you mean the Automatic Transmission drain & fill service. I'd try a Nissan dealership and see if they give you a reasonable quote, if it's in the $200 range that would seem fair IMO. Make sure it's as per the FSM which is a 3x drain & fill vs. just a single drain & fill. I would avoid a flush as this can cause problems if too much force is used.