How much money is a 75 Triumph motorcycle worth?

There were four models for 1975. 750 Bonneville $2000-$4000 Trident $3500-$5000 750 Tiger $2000-$4000 500 Daytona $1500-$3000 Prices for bikes assumed running, in reasonable shape. Basket cases less. Immaculate examples more. All were very good bikes.