The following had 1 vote and a couple are nich retailers, N scale, DCC but deserve mention because at least one person thought enough of them to add to our list.
As an overseas customer I’ve always had good service from Walthers, but personally my own preferred US supplier is Midwest Rail Junction of Rockford, IL (also on eBay), who I have always found to be excellent.
Looking through the list posted above there is one supplier named which I certainly wouldn’t use again, though I don’t know if it would be fair to identify them here. I’d ordered an Athearn Genesis Milwaukee Road MP15AC as part of a larger order, and when it arrived the locomotive’s box was empty. I saw the funny side at first, and assumed that they’d had the model on display and had sent the empty box by mistake. However after several unacknowledged e-mails I phoned them, and they claimed that this was impossible but that they would look into it and get back to me. They never did, and after further communication was ignored I gave up. If anyone wants to buy an empty Athearn G66060 box I’m open to offers…
I don’t want to risk inviting the thread to degenerate into a forum for complaints about suppliers, but I will say that it was a Milwaukee Road MP15AC. In fairness, I’d used them several times before with no problems.