The blue one is definitely a Rupp Dart.
An original Rupp steering wheel in good shape is worth $75-100.
Turbine wheels with no broken fins and good chrome outers are $75-100....each.
If the seat is undamaged that's another $150+.
Not that you plan to part it out, just letting you know what you have.
What's bent on it?
Any parts you need or repair advice, call Robert Stanton (Robron Inc).
He worked at Rupp and bought all the kart stuff when Rupp got out of karts.
He does everything from nuts and bolts to complete karts, and is one of the nicest people you'll ever meet.
He runs a working farm as well so if you don't get him first try, leave a message.
(843) 479-6962
robroninc@bellsouth.net