Unless that Chazy Trek has a lockout on the suspension fork, I would pass. At your size, I'd stick with a rigid frame bike. I have a Marin Muirwoods, love it, but the handlebar setup is very wide. Stable, but not efficient for aerodynamics on ADK downhills.

If you want used, try the Old Spokes home in Burlington. In fact the Vermont CL carries a lot more listings than the Plattsburgh CL.

Also, this shop opened recently, but I don't know what his inventory is like, so call ahead.
http://www.humanpowerplanetearth.com

This deal looks decent too if you canget the seller down 10-15 percent.

http://burlington.craigslist.org/bik/4465053258.html

Also, if conserving cash is important, check out the drop bar mountain bike conversion thread under C+V. I built the equivalent of an LHT from a Miyata TerraRunner for a total oulay of $150.00.