Sorry for the late reply Russ, as I just saw this post. Glad you got the carb issue figured out.
The "what's it worth" question is harder to nail down, as it depends on your area, demand, etc.
A good way to gage value is to look thru your local Craigslist lawn tractor listings, and see what similar machines are going for. The one thing that is driving the price of these machines now is scarcity...
Rattosh51
YT6800