2 year old, previous generation style baby ninja for $2299? The brand new 2008 one is $1200 more, and looks better.
The MSRP of the 2006 baby ninja brand new was $2999. So they're only knocking off $700? Definitely haggle with them. Just be aware that it's spring, and they probably won't budge that far. With people finishing up basic rider courses, the "beginner" bikes move.
New or old, the 250R is a nice bike. If my lard-ass didn't look ridiculous on one, I'd probably buy one.
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1. Call your insurance company. Make sure you know how much it is to insure.
2. Read this:
http://www.clarity.net/~adam/buying-bike.html . It's one of the better used bike "what to look out for" write ups out there.
3. If you haven't already, take a MSF basic rider course.
4. If you want to lurk a motorcycle safety oriented board,
http://msgroup.org is a good one.