No prices are allowed in open forum, but my advice is to contact Rob direct to confirm they are in fact a dealer. Rob has many authorized dealers, but I'm not familiar with that specific one. IIRC I have heard of a dealer in Portland though.
To be honest though I'd be looking at an AutoCal instead. It's only a little bit more money and it will give you the device in case you want to do future upgrade.
You'll be able to flash updated tunes yourself, datalog the truck, and check trouble codes.
If you move or that shop closed you'd find yourself in no better situation if you upgrade your truck in the future.