I find adorama better to deal with in person than through email. Also, be sure to check what they are charging for shipping. I have had several instances where they sold something for less than B&H, but their shipping charge was significantly higher, effectively making them more expensive. I have not ordered much used stuff from them, but I think in general it is better to call them and talk to them than it is to use email. Personally, I leaved the used stuff to KEH or Camera West unless I can check it out in person.
But again, I have had extremely good contact with Adorama in person. They were really nice. They actually stayed late on a Friday for me (when they have to be home before sunset) so that they could find something back in stock. They were really nice about it and even though they had closed up the whole store, they kept telling me: "Oy, don't worry about it. We have to stick around a bit anyway."