Hi Jerry......welcome to TFF!
Bill is absolutely right....in order to properly identify and evaluate your guns, we need some good, clear, photos.....full size left and right profile, and closeups of any unusual markings.
Also, all of the writings on the gun, exactly
as they're written.
On your Colt .380. It's probably a Type II Model 1908 Pocket and, according to the serial #, was made in 1920.
Value will depend on condition and originality. "Fantastic condition" doesn't really tell us much. If it's in excellent condition, has the original nickle finish and original factory pearl grips....it could
be worth up to $1,000.
On your Derringer, your 7 shot revolver, and your Whitney revolver.....we'll need more detailed info, caliber, pix, and all of the writings on the guns.