First of all, D&V is probably one of THE best body shops in the area, hands-down. Nobody will tell you they're cheap, because they're not. I have friends with high-end cars, not to mention well-trusted detailers, that only deal with D&V. That speaks volumes to me. If they want too much, in your opinion, go elsewhere. They're not the only game in town. Caliber Collision in Purcellville did mine, for less than my insurance deductible would have been.
Take a photo of the specific piece that is broken and post it here. If it's the black shiny plastic bumper cover that your license plate bracket mounts to, then that is a $55 part. BUT the front fascia most likely needs to come off to replace it. And in my case, the lower grill surround was also cracked but you couldn't tell until parts started coming off.
Removing and re-installing all of those parts takes time, and time is money. So expect to be out a couple of hundred bucks in labor OR buy the part and install yourself. I'm sure there are folks around here willing to help out.
Sorry to hear about your damage but complaining about prices of ONE PLACE isn't productive. If you don't like the prices or their suggestions, move on. Plenty of places in the DC area to deal with.
-Jim