Hurley's Auto Audio in Tyson's does this. No personal experience with them, though. https://hurleysautoaudio.com/ They say they'll install units you bring them, as well as units you purchase from them.
Can anyone recommend a place in NoVA where I can get a dash cam installed? Lots of people say its an easy DIY job, but I really don't feel comfortable doing it myself and would prefer to pay someone to do it. I know Best Buy does it, but any other places? Also if you've had good or bad experiences with Best Buy, please share. My car is a 2016 Lexus NX.