Maybe you should try
here
Did notice something fairly interesting. Raven II, an increase in Max gross weight of 100 lbs over earlier models giving 2500lb. Weight of aircraft w/standard equipment 1500lb. Payload 1000lb.
Anyone look at the old model, Raven, max gross 2400lbs and an empty weight of 1442lb. Payload 958lb.
$28,000 for an increase payload of 42lb....
Doesn't seem like that great a deal!!!!