The closest dealer, in Souderton PA, has none in stock and says they do not expect to have any, anytime soon.
I thought I could help out with some closer dealers, but it looks like those options no longer exist. Reines RV in Manassas added Roadtrek to their inventory a couple of years ago, but they were purchased by Camping World this year, and appear to have dropped Roadtrek, judging by their website.
There's also Leo's RV in Gambrills, MD. I tried to buy a 2012 RT 210 from them at the end of the 2013 model year when I was looking, but they didn't seem to want to budge from a price that simply didn't reflect that the unit was almost 2 years old. I ended up at Keystone RV in Greencastle, PA, barely above the Maryland line. However, their website now also indicates that they no longer are a RT dealer, which the Roadtrek website seems to confirm.
I never did find a 210 model, but went with the RT 190 with the permanent bathroom. They enlarge the bathroom by removing the second row of captains chairs, and also add a closet-like cabinet behind the driver's seat. The bathroom is tight, but workable, particularly if you mostly use campground showers. Might want to check it out if the 210 remains elusive.
2013 RT 190-Popular