Finally checked out EchoPark Automotive Charlotte (Charlotte, NC) after seeing their lot on my commute for months. They keep around 39 vehicles, mostly family SUVs and sedans. They were totally fine with my mechanic doing a once-over, which honestly settles half the trust question.
Lot address: 3648 E Independence Blvd, Charlotte, NC 28205. Visitor parking: Lot on Independence Blvd. Website: https://www.echopark.com. Board status: verified / trusted dealer.
Paper side: licensed with the state (looked it up), about 95% of stock has title in hand per the office, and they offer a 30-day/1,000-mile powertrain warranty.
Overall: decent cars, pushy back office. The $349 doc fee is fine but watch the add-on sheet — say no twice and the price comes back to earth.