What's your location?
How complete are you looking for, just a short motor, or everything from top to bottom? I don't have anything "new" or new-ish, but I do have a few good cores that could be built.
Finding one of these motors in shiny new condition is pretty unusual unless you have one built or build it yourself, but finding an original that is a healthy runner does happen. E.g., here's one that is said to run well for $600, that even comes with a fairly straight-looking 240 attached:
http://vancouver.en.craigslist.ca/va...401726795.html 
Forum member Anders might have a good-running used unit, so you could check with him too.
One thing to note from my own experience: I'd personally caution against buying anything that's advertised as "rebuilt" unless you can get verified info on who built it and their level of specific knowledge. The last three that I had apart after catastrophic failures were all recent rebuilds (20k miles or less) that had something bad happen to them due to preventable error: sheared crank key, broken-off piston squirters, bent cylinder head milled flat, TB snafus etc. In fact, the only really "catastrophic" failures I have ever seen with one of these motors have been caused by mechanic or rebuilder error. There's nothing especially complex about them but there are a couple areas where a guy working without the needed tools and information can make a mistake that leads to serious consequences. I doubt this is a problem you'll have with a motor you get from anybody here, but something to be aware of if you look elsewhere.
Welcome to the forum!
