I wouldn't pay $185 either, but...
I bought the then latest, greatest release (6.62A) back in December for $58, less than half the Honda/Alpine price on eBay. New, in the sealed package. Works perfectly. They are generally selling for higher than that now - I got a really good deal back then, but they were probably averaging under $85 on eBay back in December.
Not only that, but I sold my original DVD (version 6.11c) a few weeks later there too. My NET difference was less than $35
Quite a large upgrade for me, as it was several iterations newer. And there WERE considerable updates for my area. It's still a few years behind reality on the road changes/additions (but better than the original 2006 version). A lot of restaurant/shopping updates are much more current now.
It was used extensively and almost exclusively on my 4300-mile (to the West-coast) trip, and (more) accurate data was helpful all along the way, as we'd NEVER been that way before.