It is quite difficult to provide a valuation for a car such as this, as the value is determined by what a buyer is prepared to pay for it, because much of the used car trade are only interested in newer vehicles. in addition, the Corsa Cabriolet is a rare car, so it is difficult to compare with other examples for sale.

One option would be to take the car to auction or use an online auction site so you can set a reserve price. This way you can gauge interest for the vehicle and avoid the car being sold for less than you are prepared to let it go for.