I went and looked at this bike tonight, test rode it. Definitely heavier than the YZ.
All the plastics needs replaced, front wheel has fix-a-flat etched onto the rim, tires need replaced, broken/taped wires under the seat, air filter looked neglected, fork seals leaking, hole in the seat, grips shot, light switch Scotch-taped to the bars, gas tank scratched and other misc scratches, etc.
I told him that I booked it out and that he has it listed at the highest retail value (1800) when in "excellent condition at the dealer".
I didn't pick it apart, but rather used the approach that Andy mentioned he uses awhile back and said I'm interested, but given it's current condition I'll offer you trade-in value of 1200.
He said he couldn't that low. I said I'd go to 1300, and he said he couldn't go any lower than 1600.
I said thanks, and left.