Looking at it on ebay, it has lots of incorrect parts. What I can see:
Front fender wrong.
Anodizing removed from brake calipers.
Brake discs are wrong.
Headlight is wrong....... I think?
Headlight mounts are wrong...... I think? Should they not be rubber mounted like a triple?
Front master cylinder is wrong.
Serial number would make it a 1974 not 1975.
A 1974 bike in the USA would shift on the left side.
Replica exhaust system that does not fit very well,
Rear fender............ can't tell but maybe incorrect?
Taillight is wrong.
Turn signals are wrong.
Seat is wrong.
Air filter box is missing.
Air in the tires is not from 1975.
I don't believe the mileage is correct either and suspect this was a crashed bike that has been made to look pretty with whatever parts he could find.
Assuming the motor is OK, I would say $7500 at most.