This is my two cents worth. I owned the F6, and before that the F5 and before that the F4... I even owned the F100 at one point.
The F6 is the nicest AF film Nikon I've ever used. It has all the great features and is a great camera to use. The AF speed alone is worth the price.
The only problem with the F6 is that it came out too late and the pro photojournalism market had switched to digital by the time the F6 was out. The F5 was the heyday of film AF cameras, then the pro industry switched to digital, and then the F6.
People who bought them hardly used them. I purchased mine used with the grip. I sold the grip off right away because I didn't want the weight/bulk and didn't need what it added.
There are many mint F6 on the market, so many of them have seen no use. I wouldn't buy a new one, the used ones will last for years with the light usage most photo enthusiasts would give it, just don't buy one a pro was using every day.