Howdy, I used to live in Sterling Park before moving to the WV panhandle a few years ago. I still go back periodically as I have family in the area.
I would suggest trying the VAHerps.com forums, as well as the Virginia and Maryland reptile classifieds groups on FB.
Heck, put them here as well, there's more than a few of us who are local to the DC metro area and I prefer local sales to shipping in, and I've travelled further than Sterling for deals on both animals and used enclosures. Also, the Manassas expo is this weekend, maybe make up and print off a flyer to hand out to folks since it's probably too late to get a table.