Yes, but they handle a huge number of coins and have been known to make mistakes in ID or even miss an occasional fake. I buy regularly and consider AAH a good source compared to most on eBay.
There have been several issues with AAH over at the CFDL group, especially with some Greek coins, like Mesembria diobols and Istros didrachms. I have made several purchases from AAH too, and have always been happy with the coins I've gotten. I consider AAH a legit seller, but maybe one a bit eager to declare his coins as genuine....
I pretty much echo what everyone else has said. I've been satisfied with what I got from them, though they seem to have a somewhat higher amount of misidentifications than most other legitimate sellers.
I think you are trying to imply that his 36 negs make him an unsuitable seller. 36 out of 103,000 (or 5 out of 9500) is actually pretty good feedback. In fact, it is about as good as they get with less than 1 per 1000 being dissatisfied.
I wasn't implying anything. I said Draw your own conclusions That means I'm giving no opinion, so look at the report and decide how you feel about not only the number of negs/neutrals, but their specific contents. My post would have been absolutely no different if the Toolhaus report had been 0 negs/neutrals, or the seller had a zero feedback. My point was simply that there is a tool to assist in evaluating any seller you aren't personally familiar with.
Toolhaus is a great resource. Sometimes you can read between the lines of a negative feedback and decide whether you believe in the seller or buyer. eBay rules against retaliatory feedback prevent scamming buyers from being IDed but sellers with over 1000 sales probably have met someone who claims not to have received a coin or swaps out coins where the photo would not make that obvious. In any event, mistakes will be made and buyers need to communicate if dissatisfied and read descriptions before bidding. The time to discover the coin you bid on was 10mm in diameter is when you read the listing, not when you opened the package.