At my local dealer there is a 2005 CRF450 for sale for $3,250. Fresh rebuild and lots of extras.
I am going to put my bone stock 2002 CR250 next to it for $3,000. and see how quick it sells.
I bet it goes in a week. Funny thing is I paid $2,900. for the 250 in 2004, And all I have done to it is two top ends and a few sets of tires.