you can look the prices up on kelley blue book or nada. in the past i was always able to buy one outright(no trade) for trade-in value or less. it just depends on which one you want and the type of riding or use it will see.both are good machines, but you may want to read some past threads because i believe the twins use more gas.
you really can't go by hours of service due to the fact that ,that is a timer in which that is how long the key switch is in the on position .mileage wise again depends on the care or abuse it has. some only get 4000,others get 7000 miles
look them over real good,tie rod ends ,brakes ,cv boots