This may be out of date…
A&R on 16th Ave. and 40th St. in Boro Park. Recommended to me by a couple of colleagues when I needed a minivan more than a decade ago. I bought from him and was happy.
New York Auto Mall. Run by a guy I went to yeshiva with. A couple of relatives bought their cars there and were happy.
Good luck. Tizku lemitzvos for looking to help a frum guy make a living.