My 2c worth, I agree with the others in that the cage would definitely put me off. IMO you're better to remove the cage and sell it separately but at a later date. Get rid of the race car stuff, it sends the wrong message despite your assurances that the car has been babied. Make sure you fill in the mounting holes and any sign it was ever there. Put the car back to as close to original 240Z spec as you can within reason, and advertise it along those lines. Externally and internally it presents well, right colour, nice engine bay, good clean condition and nice aftermarket wheels.
Regarding the asking price, well IMO it does seem a tad hopeful for an unrestored car, but who knows. Whether the car owes you a little or a lot is not a potential purchaser's problem. As has been said above the market has slowed for hobby cars of all sorts, more supply and less demand.