My opinion?
Basket cases = almost free. In general, nobody wants em, and there are lots to pick from.
Both of my recent dirt bike finds were basket cases. I got both for less than a new helmet costs. Neither bike actually needs that much to get back up and running, either. The WR even has all of the small parts ziplock bagged and tagged.
Quad value? I'd shoot for $200-300 max if you're sure everything's there. Some dudes have that "Barrett-Jackson" mentality, 'cause they had a friend's cousin's Uncle's grade school teacher see a 250R advertised for $3K somewhere.
Doesn't make their basket case worth $3K.
Some may be insulted, some are realistic.
BTW, how did the CR250 acquisition go?