This looks to be a flip, and doesn't appear to have been stored in the best conditions, but might be worth checking out. I'd like to see pics of the car before digging it out of storage...the interior looks pretty crusty.
Tires are obviously newer than 1975 so it does appear that the seller has done some 'prepping' to get the car sold.
Unlike '69 Chevelles and Camaros, the green-on-green color combo seems relatively uncommon on Corvettes. Pretty sharp if you ask me.
Link to 1969 Corvette Convertible auction