I picked up a near mint M6 non ttl in Feb 2008 for $1100 US from a Leica dealer. I love the thing. I think it's worth it. It's incredibly easy to use. And the lenses make photos that look magical. No joke.
Maybe it's because the Leica was only company that cared to engineer a great rangefinder (and RF is the proper 35mm camera design IMHO). I like that the m6 is fully mechanical.