appears to be stretched.. thus all collector value is basically nulled
front rims seat padding and steering wheel is essentially all that's left being of a collectors value
to some degree.
(can't see the brake drum.. maybe incl that)
given the condition it sits in I vote for less than 200 tbh
Where are you located? I've seen a couple of vintage racing Rupp karts for sale lately. These are period correct vintage racing karts, some complete and ready to race others needing work.